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9 Cards in this Set
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Matter ; anything with both mass and volume . |
Proton ; the positively charged subatomic particle in the nucleus . |
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Nucleus ; the center of the atom , home of the protons and neutrons . |
Atom ; the smallest complete unit of matter ; ¨the building blocks of matter¨ |
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Electron ; the negatively charged subatomic particle found in the cloud surrounding the nucleus . |
Valence Electron ; electrons on the outermost shell of the electron cloud . |
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Atom Number ; the number of protons in an atom of a given elements . |
Chemical Symbol ; an abbreviation for the name of an element . |
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Periodic Table ; an organized listing of all know elements . |
Period ; horizontal row on the the periodic table . |
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Mass Number ; the mass of an atom of a given element ; also equals the number of protons & neutrons in the atom . |
Group ; a vertical column on the periodic table . |
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Noble Gases ; the last reactive elements ; also known as inert ; Group 18 . |
Metal ; any elements with luster , malleability , ductility & serves as a conductor of heat & electricity . |
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Halogens ; the most reactive nonmetals ; Group 17 . |
Nonmetal ; any elements that lacks luster , is brittle & serves as an insulator from heat & electricity . |
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Alkali Metals ; the most reactive metals ; Group 1 . |
Metalloid ; elements that exhibit properties of both metals & nonmetals . |