Atoms
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Created by:
emmagirl505 on September 22, 2011
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16 terms
Terms | Definitions |
|---|---|
 atom | smallest particle of an element that has the characteristics of that element. |
| element | cannot be broken down into simpler substances and has the .. |
| proton | positive charge found in the nucleus |
| neutron | no charge found in the nucleus |
| electron | negatively charged, in the energy levels around the nucleus |
| compound | substance made of two or more elements |
| molecule | smallest unit of a compound that retains the chemical characteristics of the compound |
| chemical bond | forces that hold elements together |
| atomic number | number of protons or/and number of electrons |
| isotope | atoms with the same number of protons but different number of neutrons of an element |
| ion | atoms that GAIN or LOSE an electron |
| cation | atoms that LOSE an electron and then become positively charged |
| anion | atoms that GAIN an electron then become negatively charged |
| nucleus | central part of an atom |
| mass number | number of protons + number of neutrons |
| energy level | surrounds the nucleus, contains the electrons |
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