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13 Cards in this Set
- Front
- Back
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What is the SI prefix of "one hundredth" (10 -z) |
Centi |
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How many meters are in 1km? |
1000 |
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What subatomic particles have the smallest mass? |
Electron |
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What is the relative charge of an electron. |
-1 |
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Which experiment led to the discovery of the nucleus and the development of the planetary (nuclear) model of the atom? |
gold foil experiment |
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What are three subatomic articles found in the nucleus of an atom. |
Protons, Nutrons, Nucleons |
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What identifies an atom as a given element? |
Number of protons in the nucleous |
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What is an isotope? |
Atoms that have the same number of protons, but a different number of nuetrons |
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The unit "u" is used to measure what? |
Atomic Mass Units |
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Instrument used to determine the relative masses of atoms. |
Mass Spectrometer |
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What is kinetic energy? |
Energy possessed by matter due to its motion. |
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What adjective describes a chemical reaction in which the products have more potential energy than the reactants (heat is absorbed; products are cooler) |
Endothermic |
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What is the most abundant element in the universe? |
Hydrogen |
