e = electron charge = 1.6x10-19 C me = electron mass = 9.1x10-31 ...
1. An electron has a __________ charge. Negative.
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Transcript of 1. An electron has a __________ charge. Negative.
![Page 1: 1. An electron has a __________ charge. Negative.](https://reader035.fdocuments.us/reader035/viewer/2022062802/56649eaa5503460f94baebe3/html5/thumbnails/1.jpg)
1. An electron has a __________ charge.
Negative
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2. Protons have a __________ charge.
positive
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3. Neutrons have a _________ charge.
neutral
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4. Where is most of the mass found in an atom?
nucleus
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5. What subatomic particles are found in the nucleus of an atom?
Protons & neutrons
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6. Where are electrons likely to be found in an atom?
Electron cloud
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7. Most of atom is __________ space where electrons are found.
empty
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8. The periodic table organized elements by
Atomic number
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9. The atomic number is the number of
protons
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10. Elements in which group are poor conductors of heat and electricity?
nonmetals
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11. What are isotopes?
Atoms of the same element that have
different numbers of neutrons.
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12. What is mass number?
The sum of the number of protons and neutrons
in an atom.
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13. What is an element?
Pure substance that cannot be broken down
into any simpler substances.
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14. The periodic table is mostly made of _________.
metals
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15. How do you get the mass number?
Round the average atomic mass to the
nearest whole number.
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16. What determines an element’s identity?
protons
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17. Which part of the atom is shared, gained, or lost when forming a chemical bond?
electrons
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18. What is the atomic number of potassium?
19
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19. What is the atomic mass of Calcium?
40.08
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20. What is the mass number of iron?
56
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21. How many protons does Silicon have?
14
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22. How many neutrons does Argon have?
22
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23. How many electrons does Phosphorus have?
15
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24. A small particle that makes up matter is called ___________.
an atom
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25. What are valence electrons?
Electrons in the outermost energy level