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2 Protons Neutrons Electrons Worksheet Answer Key 2023-07-16 space. It is the study of such things as the transfer of energy in Earth's atmosphere; the evolution of landforms; patterns of change that cause weather; the scale and structure of stars; and the interactions that occur among the water, atmosphere, and land. Earth science in this book is

give students context prior to engaging in the activity. Examples could include Frayer Model vocabulary activities. Bloom’s Levels: Remember Webb’s DOK: 1 Rubric: Use the student responses to evaluate what the students know about atomic structure. Look for any misconceptions students may have.(a) electrons and neutrons (b) electrons and protons (c) protons and neutrons (d) all particles are attracted to each other; The atomic number of an atom is: (a) the number of electrons (b) the number of neutrons (c) the number of protons (d) the number of protons plus the number of neutrons; Changing the number of neutrons of an atom changes ...The periodic table using this card sort is an element namesymbol atomic mass, show a large volume of protons neutrons, or by any time if an isotope practice worksheet answer key. If a noun write common write common noun on lift line. How many protons and answer key classUse your diagrams and the information in the Student Guide to answer the questions. Hydrogen has been completed for you. 2. Explain why the charge is 0 (zero) for each of the four atoms that you built on the diagrams. 3. Rewrite the following statement so that is it TRUE: The number of protons and neutrons for these atoms increases sequentially ...You'll get a detailed solution from a subject matter expert that helps you learn core concepts. See Answer. Question: 1. Complete the table below for protons, neutrons, and electrons. Respond with a Y for yes or N of no. Question Proton Neutron Electron 1 Identifies Element? N Affects Mass? 3 Affects Charge?Atoms have three parts that work together. The protons carry a positive charge, while the electrons have a negative charge. The neutrons have no charge. All atoms have the …STUDENT JOURNAL Part I: Plan Your Investigation 1. My Question of Inquiry. 2. What do you need to do to answer this Question? 3. What are the variables that you will observe? 4. Tools and equipment needed. Tool Purpose 5. Safety Precautions. 6. List the steps of your procedure to observe the different samples. The Gas Sample

Protons Neutrons Electrons Worksheet Answer Key. Protons Neutrons Electrons Worksheet Answer Key - Web this simple worksheet shows students how to use the periodic table to find the element name, symbol, atomic number, mass. This is an 8 question quiz on calculating protons, neutrons and electrons and identifying atomic number and atomic.a (compound) A covalent bond is formed as the result of. a) tranferring electrons. b) sharing an electron pair. c) transferring protons. d) sharing a proton pair. b (sharing an electron pair) Water molecules are polar, with. a) the oxygen side being slightly positive and the hydrogen side being slightly negative.About. Transcript. Learn how atoms are made up of protons, neutrons, and electrons. Elements are defined by the atomic number, the number of protons in the nucleus. The mass of an atom is determined by the total number of protons and neutrons. Created by Sal Khan.Describe the relationship between the number of protons in the nucleus and the attractive force between the nucleus and electrons. group or column Distance is a factor when comparing elements in the same ______________.Open the Build an Atom simulation. (a) Drag protons, neutrons, and electrons onto the atom template to make a neutral atom of Lithium-6 and give the isotope symbol for this atom. (b) Now remove one electron to make an ion and give the symbol for the ion you have created. 16.Students are not expected to know the answers to the Prior Knowledge Questions.] There are several definitions of acids and bases. According to the Brønsted-Lowry definition, an acid is a substance that is capable of donating a proton to another substance. A base is a substance that accepts protons.

brainpop chemical bonds answer key. Which of the following is a true statement about atomic nuclei? A) They are made up of protons, neutrons, and electrons. answer b They have a net positive charge correct. B) They have a net positive charge. answer c Every atomic nucleus has the same number of particles. C) Every atomic nucleus has the same ...place—the loss and gain of electrons. The exchange of electrons between atoms is a very common way for chemical change co take place. We will see it many times throughout …The properties of these fundamental particles are summarized in Table 2.2.1 2.2. 1. You may notice the sum of an atom's subatomic particles does not equal the atom's actual mass: The total mass of six protons, six neutrons, and six electrons is 12.0993 u, slightly larger than the 12.00 u of an actual carbon-12 atom.Rhodium has 45 protons, 58 neutrons and 45 electrons: 46: Palladium has 46 protons, 60 neutrons and 46 electrons: 47: Silver has 47 protons, 61 neutrons and 47 electrons: 48: Cadmium has 48 protons, 64 neutrons and 48 electrons: 49: Indium has 49 protons, 66 neutrons and 49 electrons: 50: Tin has 50 protons, 69 neutrons and 50 …

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The electrons in the outermost energy level of an atom; they determine the reactivity of an atom. Outermost Energy Level Area surrounding the nucleus that contains electrons and is furthest away from the nuclues, contains valence electrons which determine the reactivity of an atom.Protons and Electrons Protons and Electrons Matter and Energy Part I: Protons, Electrons, and Neutrons 4. Neutral Atom of Beryllium Atomic Number = 4 Atomic Mass = 9 (rounded) Number of protons = Number of neutrons = Number of electrons = Number of Energy Levels = Is the last energy level full? 3. Neutral Atom of Lithiumthe sum of the number of neutrons and protons in an atomic nucleus (protons+neutrons) average atomic mass the average mass of the element's isotopes, weighted according to the abundance of each isotopeUsing journal prompts can help you explore and understand your feelings and emotions. It can also help you heal. Journaling can be a useful tool for working through your emotions a...The discoveries of electrons, protons and neutrons were made by J. J. Thomson, Ernest Rutherford and James Chadwick respectively. They were staggered over a period of 35 years. J. ...Do not give students this key. Physical Science: Electricity and Electronics Guided Notes Guided notes answer key for Electricity and Electronics. These notes are to help you keep track of terms, formulas, and some important concepts. They are for your own understanding and do not need to be submitted to Penn Foster.

In this set of practice problems, we will go over the atomic structure, subatomic particles, determining the number of protons, neutrons, and electrons, as well as writing correct chemical formulas. Check Also. Subatomic particles and Isotopes. Naming Monatomic and Polyatomic Ions. Naming Ionic Compounds.The Atom quiz for 8th grade students. Find other quizzes for Science and more on Quizizz for free! ... protons and electrons. photons and neutrons. ... Explore all ...reaction, CNO cycle, catalyst, deuterium, electron volt, fission, fusion, isotope, nuclear reaction, positron, positron emission, proton-proton chain Prior Knowledge Questions (Do these BEFORE using the Gizmo.) The chart to the right gives the isotope name, element name, number of protons, and number of neutrons of three isotopes. 1. What do you notice about the isotope number and the sum of ...Explore the history and development of the atomic model and characteristics of subatomic particles (protons, neutrons, electrons) in this interactive tutorial. Student Resources Vetted resources students can use to learn the concepts and skills in this benchmark.Indira Narine - Polarity Lab. 7.01 Endothermic and Exothermic. Copy of Chemical Changes Lab Document. Bohr Model Intro SE. Electron Configuration SE. Stoichiometry SE - WORKSHEET. WORKSHEET name: date: student exploration: nuclear decay vocabulary: alpha particle, atomic number, beta particle, daughter product, gamma ray, isotope, mass.We like to think a perfect process for getting things done exists, but in most real world applications it's just not possible. As design blog Happy Cognition points out, flexibilit...21. Identify the diagram below that depicts a hydrogen atom with an electron moving from energy level 3 to energy level 2. Label that diagram with "n=3 to n=2," list the appropriate wavelength, and color the wavy line with the correct color as on the bottom of page 1 to represent the appropriate corresponding color of light emitted.This free textbook is an OpenStax resource written to increase student access to high-quality, peer-reviewed learning materials. Skip to Content Go to accessibility page Keyboard shortcuts menu. Chemistry: Atoms First 2e Chapter 4. Chemistry: Atoms First 2e Chapter 4. Close. Contents Contents. Highlights. Print. Table of contents. Preface; 1 Essential …Gizmo Warm-up Just like students sharing markers, atoms sometimes share or swap electrons. By doing this, atoms form bonds. The Ionic Bonds Gizmo allows you to explore how ionic bonds form. To begin, check that Sodium (Na) and Chlorine (Cl) are selected from the menus at right. Click Play ( ) to see electrons orbiting the nucleus of each atom ...The number of orbitals in the second principal energy level of an atom (n = 2) is: 1. 2. 4. 9. 16. This is another question involving quantum numbers. If n = 2, then there may be 4 orbitals (1 s orbital and 3 p orbitals). This fun chemistry quiz covers atomic structure, including oxidation numbers, valence, quantum numbers, and Lewis dot ...Study with Quizlet and memorize flashcards containing terms like Structure of an atom Atoms are incredibly tiny, so small that most microscopes can't even see them, but atoms themselves are made of even smaller particles: protons, neutrons, and electrons. Answer the following questions related to protons, neutrons, and electrons. Select the correct answer from the options available; then ...Neutrons worksheet protons electrons practice answers key answer isotopes worksheeto viaElectrons neutrons protons Atomic neutrons electrons protons subatomic basic atoms particle paintingvalley isotopes briefencounters particles chessmuseumProtons neutrons and electrons practice worksheet.

Using the Periodic Table of Elements Sheet 1. Use the chart and your knowledge of chemistry to complete the blanks for atoms of each element. You will learn the not only find the atomic number, mass, and symbol, but you will learn how to translate that to a a number of protons, neutrons, and electrons for a stable atom.

MJ. This worksheet provides 18 examples for students to determine the protons, electrons, neutrons, atomic #, mass #, hyphenated name, and isotope symbols for various atoms and ions. A complete answer key is provided at the end. This worksheet can be used in any Chemistry class, regardless of the students' ability level.Windows Explorer Has A New Name - Microsoft Support. Windows Explorer has a new name Windows 10 It's called File Explorer in Windows 10. Here are three ways to open …Part I: Protons, Electrons, and Neutrons, continued The information in each box on the Periodic Table provides you with all of the information you need to determine the number of protons, neutrons, and electrons in a neutral atom. Atomic Number = Number of Protons In an electrically neutral atom, the protons and electrons are equal.Atoms are made up of three basic parts; protons, neutrons, and electrons. There is a core, or nucleus, and an electron cloud. The nucleus is made up of positively charged protons and neutral neutrons. The nucleus is held closely together by electromagnetic force. Protons and neutrons make up the nucleus of the atom.For example, the protons in the nucleus of an atom have attraction for the electrons surrounding the nucleus. This is because the pro-tons are positive and the electrons are negative. The attractive force can be weak or strong. In this activity, you will explore the strength of attraction between protons and electrons in various atomic structures.A negatively charged subatomic particle of the. electron cloud that is involved in the formation of. chemical bonds. Atomic Number. The number of protons in the nucleus of …Assuming that this atom of calcium is neutral, it would have 20 electrons. 2.A. Why do all isotopes of an element have the same chemical properties? The only difference between an isotope and the original element is extra neutrons. 2.B. Compare the structure of carbon-12 and carbon-14. Carbon-12 has an atomic mass of 12 (6 protons and 6 ...

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Study with Quizlet and memorize flashcards containing terms like protons have a _____ charge, protons and neutrons are found in _____, the number of _____ identifies the element and more. ... Students also viewed. 3.2 - The Microscope: Window on an Invisible Realm. 42 terms. lindsey_sewall. ... electrons = protons. neutral. energy level 1 has ...Chapter 9 Lesson 2: Protons, Neutrons and Electrons. Share. atomic number. Click the card to flip 👆. The number of protons in an atom of an element. is the whole number listed with each element on the periodic table. Click the card to flip 👆.the sum of the number of neutrons and protons in an atomic nucleus (protons+neutrons) average atomic mass the average mass of the element's isotopes, weighted according to the abundance of each isotopeObjectives. By the end of this project, students should be able to. Identify the chemical symbol, atomic mass, and atomic weight for an element. Identify the number of protons, neutrons, and electrons in one atom of an element. Create Bohr diagrams. Describe the types of elements that bond together.1. 16 protons, 18 electrons. Express your answer as an ion. 2. 37 protons, 36 electrons. Express your answer as an ion. 3. 53 protons, 54 electrons. Express your answer as an ion. 4. 14 protons, 10 electrons. Express your answer as an ion. There are 2 steps to solve this one.Windows Explorer Has A New Name - Microsoft Support. Windows Explorer has a new name Windows 10 It's called File Explorer in Windows 10. Here are three ways to open it: Select the Start button and find it on the Start menu. Press the Windows logo key + E. Select the folder icon on the taskbar.Element Practice Atomic Number - Represents both the number of protons and in an element. electrons Most of the mass comes from the neutron and proton. To find the number of neutrons, atomic weight from the atomic subtract the mass. 2 Atomic Symbol - a short hand way of writing each elements name. He 4 Atomic Mass - The weight of an ...First, to find the number of protons, we need to realize that the neutral atom had 53 electrons because it is the additional one electron that makes it a 1- anion. Now, because the atom has 53 electrons, it must also have 53 protons, and to find the number of neutrons we subtract this from the mass number. # n = A – # p = 127 – 53 = 74 ...Electron configurations are a simple way of writing down the locations of all of the electrons in an atom. As we know, the positively-charged protons in the nucleus of an atom tend to attract negatively-charged electrons. While these electrons all stick within the atom because of their attraction to the protons, they also mutually repel each ...A student reports on an atom that has 11 protons 10 neutrons and 10 electrons. What is the wrong with the students report? An atom must have the same number of protons and electrons.This free textbook is an OpenStax resource written to increase student access to high-quality, peer-reviewed learning materials. ... The protons in the nucleus do not change during normal chemical reactions. Only the outer electrons move. Positive charges form when electrons are lost. 3. P, I, Cl, and O would form anions because they are ... ….

9. One of your classmates is having trouble understanding ions. He explains the formation of a cation like this: "When you add an electron, you get a positive charge because adding is positive in math.". a. As a group, explain in a grammatically correct sentence why this student is incorrect. b.Table 4.4.1 4.4. 1 gives the properties and locations of electrons, protons, and neutrons. The third column shows the masses of the three subatomic particles in "atomic mass units." An atomic mass unit (amu amu) is defined as one-twelfth of the mass of a carbon-12 atom. Atomic mass units ( amu amu) are useful, because, as you can see, the mass ...The angstrom is a convenient non-SI unit of length used to denote atomic dimensions. Because most atoms have radii around 1 × 10-10 m, we define 1 Å = 1 × 10-10 m. Atomic number (Z) = number of protons in the nucleus. Mass number (A) = total number of nucleons in the nucleus (i.e., protons and neutrons). Z .Protons, Neutrons, and Electrons Practice Worksheet Fill in the blanks in the following worksheet. Please keep in mind that the isotope represented by each space may NOT be the most common isotope or the one closest in atomic mass to the value on the periodic table. Atomic symbol Atomic number Protons Neutrons Electrons Atomic mass B 6 11 24 31 ...Protons neutrons electrons review KEY. Course. Microbiology Lab (MCB2010L) ... use the periodic table to find in column 2 the total number of electrons that ion contains. The same answer may be used more than once. B 1. ... Ion Number of Protons Number of Electrons Co+2 27 25 Co+3 27 24 Cl-1 17 18 K+1 19 18 S-2 16 18 Sr+2 38 36 Al+3 13 10 P-3 ...The atomic mass unit (amu) is a unit of mass equal to one-twelfth the mass of a carbon-12 atom. 4.3: The Properties of Protons, Neutrons, and Electrons is shared under a CK-12 license and was authored, remixed, and/or curated by Marisa Alviar-Agnew & Henry Agnew. Electrons are extremely small.Gizmo Warm-up Just like students sharing markers, atoms sometimes share or swap electrons. By doing this, atoms form bonds. The Ionic Bonds Gizmo allows you to explore how ionic bonds form. To begin, check that Sodium (Na) and Chlorine (Cl) are selected from the. menus at right. Click Play ( ) to see electrons orbiting the nucleus of each atom ...Key Concepts. The periodic table is a chart containing information about the atoms that make up all matter. An element is a substance made up of only one type of atom. The atomic number of an atom is equal to the number of protons in its nucleus. The number of electrons surrounding the nucleus of an atom is equal to the number of … Explore student journal protons and electrons answer key, However, protons, neutrons, and electrons are the ones we care about in chemistry, so save it for your physics teacher. 3. The mass of a proton is actually 1.007 atomic mass units (amu or u), while neutrons weigh about 1.009 amu. This mass is incredibly tiny, with 1 amu equal to about 1.661 x 10 −27 kg. 4., Gizmo Warm-up Just like the students described above, nonmetal atoms can share electrons. As you will see in the Covalent Bonds Gizmo, atoms form bonds in this way. To begin, check that Fluorine is selected from the Select a substance menu. Click Play ( ) to see the electrons orbiting the nucleus of each atom., Protons, electrons, & neutrons (protons & neutrons are part of the nucleus). ... Share. A great study guide that will prepare you for a test or quiz of this material. 👍🏻. Share. Students also viewed. Chapter 9 Lesson 2- Protons, Neutrons, and Electrons- How Atoms Differ. 26 terms. Dylan_Hahne. Preview. ... See an expert-written answer!, You'll get a detailed solution from a subject matter expert that helps you learn core concepts. Question: What are the number of protons, neutrons, and electrons in the following isotopes? Express your answers as integers separated by commas 1. 52 over 25 Mn . Np, Nn, Ne = 2. 31 over 15 P Np, Nn, Ne = 3. 81 over 35 Br Np, Nn, Ne =., protons, electrons, and neutrons in an atom. Use atom symbols and the periodic table to create diagrams showing the location and correct number of protons, electrons, and neutrons in different atoms. Ask your teacher for the handout and card set that accompany this lesson. You will also need a copy of a paper titled "Atom Data Sheet", 9. One of your classmates is having trouble understanding ions. He explains the formation of a cation like this: "When you add an electron, you get a positive charge because adding is positive in math.". a. As a group, explain in a grammatically correct sentence why this student is incorrect. b., The atomic number is the number of (protons/neutrons) in the nucleus of an atom of an element. 7. Isotopes have the same number of protons but different numbers of (electrons/neutrons). 8. An ion has a charge because it has gained or lost (protons/electrons). 9. A (positive/negative) ion has more protons than electrons. 10., Windows Explorer Has A New Name - Microsoft Support. Windows Explorer has a new name Windows 10 It's called File Explorer in Windows 10. Here are three ways to open …, This question is about Personal Loans @manuel_plain • 10/04/18 This answer was first published on 10/04/18. For the most current information about a financial product, you should a..., Iron is an element because it is composed of one kind of atom. lond Gizmo Warm-up Atoms are tiny particles of matter that are made up of three particles: protons, neutrons, and electrons. The Element Builder Gizmo shows an atom with a single prolon. The proton is located in the center of the atom. called the nucleus. 1. , Part I: Protons, Electrons, and Neutrons, continued The information in each box on the Periodic Table provides you with all of the information you need to determine the number of protons, neutrons, and electrons in a neutral atom. Atomic Number = Number of Protons In an electrically neutral atom, the protons and electrons are equal. , Gizmo Warm-up Just like students sharing markers, atoms sometimes share or swap electrons. By doing this, atoms form bonds. The Ionic Bonds Gizmo allows you to explore how ionic bonds form. To begin, check that Sodium (Na) and Chlorine (Cl) are selected from the menus at right. Click Play ( ) to see electrons orbiting the nucleus of each atom ... , An atom is composed of two regions: the nucleus, which is in the center of the atom and contains protons and neutrons, and the outer region of the atom, which holds its electrons in orbit around the nucleus. Protons …, 7.What statement can be made about an electrically neutral atom’s number of protons and electrons? _____ _____ 8.Look at the example, using the atoms that you built on the diagrams, then complete the rest of the data table: Total Mass from Protons and Neutrons. Atom Atomic number Number of protons Number of electrons Copper 29 Boron 5 Uranium 92, Gizmo Warm-up Just as the thickness of a book changes how strongly a magnet attracts a paper clip, the size of an atom determines how strongly the nucleus attracts electrons. In the Periodic Trends Gizmo, you will explore this relationship and how it affects the properties of different elements., Indira Narine - Polarity Lab. 7.01 Endothermic and Exothermic. Copy of Chemical Changes Lab Document. Bohr Model Intro SE. Electron Configuration SE. Stoichiometry SE - WORKSHEET. WORKSHEET name: date: student exploration: nuclear decay vocabulary: alpha particle, atomic number, beta particle, daughter product, gamma ray, isotope, mass., Table 1.15.1 1.15. 1 gives the properties and locations of electrons, protons, and neutrons. The third column shows the masses of the three subatomic particles in "atomic mass units." An atomic mass unit (amu amu) is defined as one-twelfth the mass of a carbon-12 atom. Atomic mass units ( amu amu) are useful, because, as you can see, the mass ..., STUDENT JOURNAL Part I: The Slope of the Line Match each description to the graph that best fits. 1. An object moving at a constant speed 2. An object sitting still 3. An object changing speed 4. The fastest moving object 1 P.4AF_2.0_EXPLORE_StudentJournal.indd 1 12/16/13 10:54 AM 6DPSOH, Aug 26, 2020 · The charge of an atom is defined as follows: Atomic charge = number of protons − number of electrons (1.8.1) (1.8.1) Atomic charge = number of protons − number of electrons. As will be discussed in more detail later in this chapter, atoms (and molecules) typically acquire charge by gaining or losing electrons. , Atomic Structure Worksheet. Atomic Structure Worksheet – Use this worksheet to label the parts of the atom to learn its atomic structure. Fill in the Blanks Atomic Structure – Your students will use this worksheet to determine the mass number, atomic number, and the number of protons, neutrons and electrons in the atoms and …, Protons and Electrons Protons and Electrons Matter and Energy Part I: Protons, Electrons, and Neutrons 4. Neutral Atom of Beryllium Atomic Number = 4 Atomic Mass = 9 (rounded) Number of protons = Number of neutrons = Number of electrons = Number of Energy Levels = Is the last energy level full? 3. Neutral Atom of Lithium, Protons, Neutrons, and Electrons Practice Worksheet Fill in the blanks in the following worksheet. Please keep in mind that the isotope represented by each space may NOT …, Protons, Neutrons, and Electrons Practice Worksheet Fill in the blanks in the following worksheet. Please keep in mind that the isotope represented by each space may NOT be the most common isotope or the one closest in atomic mass to the value on the periodic table. Atomic symbol Atomic number Protons Neutrons Electrons Atomic mass B6 11 24 31 ... , Students will be introduced to the idea that abrasive and tape with their hands caused electrode go move from their body to the plastic giving the plastic a negative duty and their skin a positive recharge. Through are activities, students will be introduced to some for the special regarding electrons, protons, and neutrons, which make up atoms ..., Weighted means that the average atomic mass is based on the_____ of each atom in a sample and the number of atoms of that_____that are present., Hence, to sum up, we have covered the discoveries of the three components of atoms: JJ discovered electrons. Thomson in the year1897. Rutherford discovered protons in the year 1911. Chadwick discovered neutrons in 1935. The discoveries of these particles are fundamental even today. The values and experimental observations gifted to us by these ..., Ch 9, Lesson 2 - Protons, Neutrons, and electrons - How Atoms Differ. Term. 1 / 8. atomic number. Click the card to flip 👆. Definition. 1 / 8. the number of protons in an atom of an element. Click the card to flip 👆., View Transcript. In the early 20th century, identification of the internal parts of the atom (electrons, protons, and neutrons) led to a modern subatomic theory. Meanwhile, the study of atomic spectra—the light given off by atoms at definite wavelengths—led to the Bohr model of the atom, where electrons exist at distinct energy levels and ..., Use the protons, neutrons, and electrons to build a hydrogen (H) atom, a fluorine (F) atom with 49 protons, a carbon (C) ion with 6 protons and 2 electrons, and a lithium (Li) ion with 3 protons and 1 electron. Next, take screenshots of the atoms and ions that you build. Make sure to include the number of protons, neutrons, and electrons used (located in the …, 4 Protons Neutrons Electrons Worksheet Answer Key 2022-06-06 Using Multimodal Representations to Support Learning in the Science Classroom Oxford University Press Science is unique among the disciplines since it is inherently hands-on. However, the hands-on nature of science instruction also makes it uniquely challenging when teaching in virtual, Figure 4.4.7 4.4. 7: A Summary of Rutherford's Experiments. (a) A representation of the apparatus Rutherford used to detect deflections in a stream of α particles aimed at a thin gold foil target. The particles were produced by a sample of radium. (b) If Thomson's model of the atom were correct, the α particles should have passed straight ..., of protons 24 24 of neutrons 34 39 of electrons 24 24. Carbon- 12. Carbon- 13. Carbon- 14. of. protons 6 6 6. of. neutrons 6 7 8. of. electrons 6 6 6. Nitrogen-15 Nitrogen-of protons 7 7 of neutrons 8 13 of electrons 7. 7. Sodium-12 Sodium-of protons 11 11 of neutrons 1 9 of electrons 11 11. PART III. Fill in the isotope names and any missing ..., SC.8.P.8.7 Explore the scientific theory of atoms (also known as atomic theory) by recognizing that atoms are the smallest unit of an element and are composed of subatomic particles (electrons surrounding a nucleus containing protons and neutrons). SC.8.P.8.5 Recognize that there are a finite number of elements and that their atoms combine in a ...