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| The outer most energy level of an atom-only 8 electrons allowed in valence shell ** Octate Law ** |
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where electrons are- 7 different energy levels-
level one-2 electrons
level two-8 electrons
level three- 18 electons
level four trhough 7- 32 electrons |
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| two or more elements bonded together |
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a representation of elements by symbols
ex. H2O= 2 hydrogen and one oxygen aka water |
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| an element is chemically stable when the valence shell is filled (8 electrons) |
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| atoms are bound in a molecule usually by an ionic bond, covalent bond, or metallic bond |
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| The chemical bond characteristic of metals, in which mobile valence electrons are shared among atoms in a usually stable crystalline structure |
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| an atom w/ an electrical charge |
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| bond in which electrons are either lossed or gained |
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| bond in which electrons are shared among two or more atoms |
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| In a polar covalent bond, the electrons shared by the atoms spend a greater amount of time, on the average, closer to the Oxygen nucleus than the Hydrogen nucleus. |
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| sharing of electrons between nuclei |
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| A chemical bond in which a hydrogen atom of one molecule is attracted to an electronegative atom, especially a nitrogen, oxygen, or flourine atom |
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| an asymmetric molecule with non-uniform positive and negative charges |
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| poisonous, harmfull to the body |
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| the number of electrons theoretically gained or lost in converting an atom or molecule to its elemental form |
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| only two elements combine to make the compound |
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| change not affecting the chemical composition |
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| a change in which a new substance is formed |
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| characteristic depending on the arrangement of the atoms in the molecule |
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| number of a certain type of atom in a chemical formula |
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| law of conservation of mass |
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| matter can not be created or destroyed |
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| chemicals produced by a chemical equation |
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| balanced chemical equation |
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| number above symbol in chemical formula |
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| in order to get the number of atoms for each element, you take the opp. charge and bring it down to make the subscript |
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| a molecule haveing 2 atoms |
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| an atom w/ more or less neutrons than normal |
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| The positively charged central region of an atom, composed of protons and neutrons |
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| positively charged subatomic particle (shown by the atomic number) |
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| neutraly charged subatomic partical * atomic mass minus the number of protons * |
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| negitivly charged subatomic partical in the energy levels of an atom |
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| ** See Oxidation Number ** |
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