化學
化學反應、化學計量、分子結構與元素性質。
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given the period and group, you should be able to identify the followin…
30. V 31. He 32. Pb
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the groups are the vertical columns on the table. identify the groups o…
25. Group 1 26. Group 13 27. Group 4 28. Group 10 29. Group 17 30. V 31. He 32. Pb
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the periods are the horizontal rows on the table. identify the period o…
20. 3 21. 5 22. 1 23. 2 24. 4
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iii by looking at the atomic number we are able to observe how many pro…
14, 13, 43, 10, 29, 26
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the periodic table also can tell us the atomic mass of elements. please…
10. 40.08 11. 6.94 12. 207.2 13. 26.98
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1. the periodic table contains chemical symbols for all elements. pleas…
1. He 2. N 3. K 4. Cu 5. Ne 6. Pu 7. H 8. I 9. Au
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average atomic mass why? most elements have more than one naturally - o…
1. 12 2. 24, 25, 26 3. No, because they are isotopes. 4. | Mass Number | Number of Atoms | | ---- | ---- | | 24 | 12 | | 25 | 6 | | 26 | 2 | 5. The isotope with mass number 24. 6.…
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1. write in the atomic number for each mg atom in model 1. 2. what are …
1. 12 2. 24, 25, 26 3. No. Isotopes have different numbers of neutrons, so different atomic masses. 4. Table as shown above (values to be filled based on Model 1 data) 5. The isot…
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3. fill in the correct answer. a. what element/ion can be represented b…
a. Sulfur b. Nitrogen c. $_{23}^{48}V$ d. 26 e. 11 f. 38 g. 16 h. 80
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counting elements and atoms atoms •the smallest part of a chemical elem…
The number of atoms in a molecule of an element can be 1 (for single - atom elements) or 2 (for common di - atomic elements) or more. The number of atoms in a molecule of a compou…
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use the following table. (if no information is given about charges or e…
See the above - filled table.
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practice molecular compound name|formula 1|cbr₄ 2|trisulfur octafluorid…
1. Carbon tetrabromide 2. Diphosphorus hexahydride (P₂H₆) 3. N/A (wrong formula for tetracarbon decahydride) 4. Ethane (C₂H₆) 5. N/A (wrong formula for dihydrogen monoxide) 6. Tet…
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what volume of 18.0 m h₂so₄ is needed to make 0.900 l of a 6.00 m solut…
B. 0.300 L
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question 4 (2 points) identify the substance that is a weak electrolyte…
C. $NH_3$
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question 3 (2 points) what is the molarity of a solution of 152.7 grams…
0.64
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question 2 (2 points) how many grams of nacl (mm = 58.44 g/mol) are req…
$83.3\ g$
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question 1 (2 points) what conversion factor can be written for a 0.50 …
$\frac{0.50\ mol\ KBr}{1\ L\ KBr\ solution}$
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question 17 1 pts what type of diagram is a graphical representation of…
Question 17: A. topology map Question 18: False
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determine the molar mass of al₂(so₄)₃·5 h₂o(s). provide an answer to tw…
432.27 g/mol
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1 of the three elements shown in the tables above, which element do you…
Without the actual table of the three elements, a specific element cannot be named. However, the best choice would be an element with a high melting point and low reactivity, like…
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true or false 15. classifying matter by state is a simple and reliable …
15. False 16. False 17. True 18. True 19. True 20. False 21. True 22. True 23. True 24. False
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13. what is the difference between the molecules of a compound? 14. whi…
13. Atoms are basic units of elements, and compound molecules are composed of different - type atoms bonded. 14. Nuclear changes (nuclear fission and fusion).
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3 how many energy levels does each atom, shown in the table below, have…
| Elements | What row of the periodic table is this element on? | Number of Energy Levels | What column of the periodic table is this element in? | Valence Electrons | |--|--|--|-…
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atomic structure & reactivity 1 mr. pauling needs you to prepare inform…
| Elements | Number of Protons | Number of Electrons | | ---- | ---- | ---- | | Aluminum | 13 | 13 | | Silicon | 14 | 14 | | Beryllium | 4 | 4 | | Elements | Rounded Atomic Mass |…
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use what you learned about macromolecules to answer the questions below…
1. For the meal eaten today, if it was a balanced meal, it likely contained carbohydrates (e.g., bread, rice which are broken down into glucose for energy), proteins (e.g., meat, …
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8. would you do more work lifting a box from the floor to the top of a …
8. More work is done lifting the box from the floor to above your head because the distance of the lift is greater. 9. The rock thrown at the glass is more likely to break it beca…
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you will need to construct a flowchart or write out a procedure for the…
1. Around 338 °C 2. A separation technique where a liquid is carefully poured off from a mixture, leaving a solid or denser liquid behind.
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8. should you do more work lifting a box from the floor to the top of a…
8. You do more work lifting a box from the floor to a shelf above your head because work $W = Fd$ and the distance $d$ is greater. The thrown rock is more likely to break the glas…
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8. do you do more work lifting a box from the floor to the top of a tab…
825 ft - lb
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which of the following best describes a polar covalent bond? a bond in …
A bond where electrons are shared unevenly between two atoms, resulting in a partial charge.
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which of the following best describes an ionic bond? a bond formed when…
A bond formed when one atom transfers electrons to another, creating charged ions.
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methyl butyrate (component of apple taste and smell): 58.80%c, 9.87%h, …
Part A: $C_{5}H_{10}O_{2}$ Part B: $CH_{2}O$
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learning goal: to use combustion analysis data to determine an empirica…
Part A: Value: 0.217 Units: mol Part B: Value: 0.433 Units: mol
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part c 2.20×10⁻² mol h₂co₃ view available hint(s) moles of oxygen = mol…
Part C: $6.60\times 10^{-2}$ Part D: $45.4$
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a neutral atom has 53 protons and 74 neutrons. what is its mass number?…
A. 127
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33 multiple choice 1 point how many neutrons are in sulfur - 34? 18 34 …
18
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part a 4.63 mol of h₂o₂ view available hint(s) moles of oxygen = mol su…
Part A: 9.26 mol Part B: 2.00 mol
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single - charge cations write the name of each of the following compoun…
1. Sodium sulfide 2. Aluminum oxide 3. Sodium chloride 4. Potassium iodide 5. Zinc bromide 6. $AlCl_{3}$ 7. $ZnO$ 8. $BaBr_{2}$ 9. $Li_{3}N$ 10. $K_{2}S$
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32 multiple choice 1 point isotopes of an element differ in the number …
B. Neutrons
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6. test your understanding of isotopes by examining the following: | at…
1. Isotopes 2. Same Atom, Not Isotopes of Each Other 3. Isotopes 4. Isotopes 5. Different Element
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which subatomic particle is involved in chemical bonding? neutron proto…
C. Electron
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29 multiple choice 1 point which subatomic particles are responsible fo…
D. Protons and neutrons
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28 multiple choice 1 point what is the general formula of a monosacchar…
A. $C_6H_{12}O_6$
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in a student experiment, the empirical formula of a copper halide was f…
CuCl
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c. oxygen - 14 3. list all of the things that are the same about these …
3. Number of protons, element identity. 4. Number of neutrons, mass - number. 5. Same number of protons, different number of neutrons. 6. No specific answer as pairs of atoms are …
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1. play with the simulation to determine: a. which particles affect the…
1a. Neutrons and protons 1b. Electrons 2a. Oxygen - 16 2b. Oxygen - 17 2c. Oxygen - 18
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10.9 kg k₂co₃ express your answer in formula units to three significant…
$4.75\times10^{25}\ K_2CO_3\ formula\ units$ ### Part B:
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the periodic table scavenger hunt instructions: write the atomic number…
1. Sodium (Na), Atomic number 11 2. Neon (Ne), Atomic number 10 3. Bohrium (Bh), Atomic number 107 4. Titanium (Ti), Atomic number 22 5. Krypton (Kr), Atomic number 36 6. Polonium…
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2. create a definition (using a complete sentence) for each of these it…
a. The element symbol is a one - or two - letter abbreviation representing a chemical element in the atomic symbol. b. The charge in an atomic symbol shows the net electrical char…
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1. using the symbol readout box, figure out which particles affect each…
| Position in symbol box | Term to describe this information | Particle used to determine this | How the value is determined | | ---- | ---- | ---- | ---- | | a | Element symbol |…
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label the parts of an atom on the diagram below. 4. what type of charge…
4. Positive charge 5. No charge 6. Negative charge 7. Protons and neutrons 8. 35 9. [Number of protons in the diagram] 10. [Sum of protons and neutrons in the diagram] 11. 15 12. …
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79 au 196.967 # of protons ____ # of neutrons ____ # of electrons ____ …
Au: Protons: 79, Neutrons: 118, Electrons: 79 F: Protons: 9, Neutrons: 10, Electrons: 9 Si: Protons: 14, Neutrons: 14, Electrons: 14 Ag: Protons: 47, Neutrons: 61, Electrons: 47 T…
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1. go to the website: phet.colorado.edu. click on html5 simulations on …
1. a - c (answers may vary based on simulation observations) 2. Protons and neutrons are found in the center of the atom. 3. Protons determine the name of the element. 4. a. Lithi…
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question 33 the term \functional\ is used in the phrase \functional gro…
D. help determine the chemical properties of an organic molecule.
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an atom that has an electrical charge is called a(n) a ion. b molecule.…
A. ion
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instructions: label the parts of the periodic table for the oxygen atom…
| Element | # of Protons | # of Neutrons | # of Electrons | | ---- | ---- | ---- | ---- | | Oxygen (O) | 8 | 8 | 8 | | Zinc (Zn) | 30 | 35 | 30 | | Lithium (Li) | 3 | 4 | 3 | | Bo…
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vocabulary assessment wk 6 the ____________ is the sum of all the force…
Net Force
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vocabulary assessment wk 6 ________ is an movement or change in positio…
Motion
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energy is the energy stored in atoms and the chemical bonds between the…
Chemical Potential
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energy, also known as elastic energy, is the energy stored in an elasti…
Law of Conservation of Energy
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energy is the energy possessed by an object due to its position in a gr…
Gravitational Potential Energy
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__________ energy is the total amount of potential and kinetic energy i…
Mechanical
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energy is the energy of motion. gravitational potential law of conserva…
Kinetic
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energy is stored energy. gravitation potential law of conservation of e…
C. Potential
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assignment b. the carbon cycle process the carbon cycle process rewatch…
carbon dioxide, methane
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answer the following questions. 6. lead has an atomic number of 82. how…
6. 82 protons, 82 electrons 7. 8 protons 8. 30 9. 85 10. 104 protons, 104 electrons 11. 84 protons, 84 electrons 12. 102 protons, 102 electrons 13. 19 protons, 19 electrons, 20 ne…
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which of the following describes a physical change? * 10 points a marsh…
1. Icicles melt from a rooftop 2. clear liquids mix, producing a cloudy liquid with yellow chunks 3. matter is neither created nor destroyed
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32. approximately how much would 8.0 × 10²⁴ atoms of silver weigh, in g…
$1435$ g
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which of the following changes demonstrates a chemical property? * 10 p…
1. substance combusts 2. salt water 3. physical properties
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what metalloid has commonly been used as an insecticide due to its effe…
A. arsenic
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what is the relationship between proximity and cognitive load for reade…
First question: Good proximity reduces cognitive load by organizing information logically Second question: Whether it creates awkward spacing that hurts readability
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in a multi - page document, what would be the most effective way to app…
1. Consistently place logos and use the same color scheme throughout 2. Proximity - related information isn't properly grouped
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in the four - step c.r.a.p. process, why does proximity come first? it …
1. It establishes the logical organization before styling 2. Clean, organized positioning of elements
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22. mass of an oxygen molecule: 0.00000000000000000000000053 g
$5.3\times 10^{-23}$ g
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22. mass of an oxygen molecule: 0.00000000000000000000000053 g multiply…
23. $4.8\times10^{-4}$ 24. $1.725\times10^{13}$ 25. $1.2495\times10^{-9}$ 26. $3.240405\times10^{3}$ 27. $4.375\times10^{-10}$ 28. $8.6315\times10^{-2}$ 29. $4.6865\times10^{21}$ …
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18. 0.00001203 19. 6.5 20. 8 21. distance from the sun to the earth: 14…
23. $4.8\times10^{-4}$ 24. $1.725\times10^{13}$ 25. $1.2495\times10^{-9}$ 26. $3.240405\times10^{3}$ 27. $4.375\times10^{-10}$ 28. $8.6315\times10^{-2}$ 29. $4.6865\times10^{21}$ …
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quinn is on a high - school volleyball team, and has chemistry during f…
the high - school volleyball team from last season, another school's volleyball team
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mars appears red because its surface is rich in iron oxide. light from …
its surface is rich in iron oxide.
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which disciplines are crucial for a career in art conservation? select …
A. chemistry B. physics C. carpentry D. art history
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question 2 (1 point) (03.01 lc) which of the following describes the el…
A. The use of a series emphasizes physical movement
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decide whether these proposed lewis structures are reasonable. proposed…
1. Yes. 2. No, it has the right number of valence electrons but doesn't satisfy the octet rule. The symbols of the problem atoms are: N 3. Yes.
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fluorine gas is placed in contact with calcium metal at high temperatur…
D. $F_2(g)+Ca(s)\xrightarrow{\Delta}CaF_2(s)$
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consider the unbalanced equation for the oxidation of butene. c4h8 + 6o…
B. four carbon dioxide molecules and four water molecules
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the compound fecl₃ is made of three molecules of iron chloride. one ato…
None of the options are correct. The compound FeCl₃ is made of one atom of iron and three atoms of chlorine.
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which statement best describes the formula equation cl₂(g) + 2kbr(aq) →…
D. Chlorine gas reacts with potassium bromide to form potassium chloride in solution and liquid bromine.
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in a chemical equation, which symbol should be used to indicate that a …
D. (aq)
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this formula equation is unbalanced. p₄(s) + 6cl₂(g) → pcl₃(l) which co…
C. 4
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which word equation shows hydrogen reacting with oxygen to form water? …
hydrogen + oxygen → water
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the compound co2 is made of two atoms of cobalt. one atom of cobalt and…
One atom of carbon and two atoms of oxygen.
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what is the formula equation for the reaction between sulfuric acid and…
C. $H_2SO_4(aq)+2NaOH(aq) ightarrow Na_2SO_4(aq)+2H_2O(l)$
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which symbol can be used to indicate the pressure at which a chemical r…
C. 2 atm
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question 13 0.2 pts some researchers emphasize the ability to recognize…
A. Emotional intelligence
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carbon atoms have four valence electrons. oxygen atoms have six valence…
Draw two pairs of shared electrons (either as lines or dots) between the carbon and oxygen atoms on the given diagram to represent the double - bond where they share electrons to …
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molecules are attracted to one another by van der waals forces. how do …
B. Van der Waals forces are weaker than ionic and covalent bonds.
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how does a molecular compound compare to the elements that make up the …
None of the above options are correct. A compound has properties that are different from the elements that make it up due to the nature of the chemical bonds between the atoms in …
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the atomic number of carbon is six, which means that a carbon atom has …
B. All carbon atoms have six protons and six electrons.
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deuterium is an isotope of hydrogen. it has a mass number of two. which…
A. a nucleus of one proton and one neutron, which is orbited by one electron
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when electrons transfer from one atom to another, both atoms become and…
1st blank: Ions 2nd blank: Ionic 3rd blank: Covalent 4th blank: Molecule
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complete the table about subatomic particles. terms can be used more th…
| Particle | Charge | Location | |--|--|--| | electron | negative | outside the nucleus | | neutron | none (neutral) | inside the nucleus | | proton | positive | inside the nucleu…
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complete the table about subatomic particles. terms can be used more th…
| Particle | Charge | Location | |--|--|--| | electron | negative | outside the nucleus | | neutron | neutral | inside the nucleus |