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chemistry vocab
Unit 3 vocabulary
| Question | Answer |
|---|---|
| atomic mass | the weighted average of the masses of the isotopes of an element |
| anion | a negatively charged ion |
| atom | the smallest representation of an element |
| Atomic mass (amu) | the unit of mass equal to one twelfth the mass of a carbon-12 |
| atomic number | the number of protons in an element |
| cation | a positive charge ion |
| charge | a property of matter that results when the number of protons and electrons are uneven in an atom |
| electromagnetic repulsions | an atomic force that results when two particles have the same charge and push against each other. |
| electron | a negatively charged subatomic particle |
| ion | a charged particle |
| isotope | vary in the number of neutrons present |
| mass number | the mass of a molecule of a substance |
| molecules | a neutral group of atoms joined togeter by covelant bonds |
| neutron | a neutral subatomic particle |
| nuclear force | holds the nucleus together |
| nucleus | composed of protons and neutrons |
| proton | a positively charged subatomic particles, |
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