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Definition
| a negatively charged particle |
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Definition
| the center of an atom; contains protons and neutrons |
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Definition
| a particle of nucleus with NO charge |
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| Postive particles in nucleus |
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| # of protons in atoms; also tells #of electrons |
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Definition
| # of protons and neutron in nucleus |
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| atoms w/different # of neutrons; radioactive |
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| levels around the nucleus that hold electrons |
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| maximum electrons allowed per energy level |
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| number of electrons floating in outermost level |
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| law that states that repeating chem and phys properties change periodically. |
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Definition
| horizontal row of periodic table |
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Definition
| vertical column in period table |
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Definition
| the process of gaining or losing electrons |
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| an atom that has gained or lost electrons |
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| element that is siny and conduct heat well |
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| element that conducts heat poorly and forms negative ions |
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Definition
| element that conduct better than insulator but not conductor. |
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| Elements of Group 18; outermost level is full. |
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| proposed that universe is made of atoms. |
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| proved existence of atoms. |
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Term
| What family is calcium in? |
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| What family is flourine in? |
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| What family is sodium in? |
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