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15 Cards in this Set
- Front
- Back
any atom or group of atoms with a negative charge
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anion
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any atom or group of atoms with a positive charge
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cation
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a compound composed pf 2 elements NaCl and Al2O3 are..........
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binary compound
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shows the number and type of atoms present in the smallest representative unit of a substance
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chemical formula
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the lowest whole number ratio of ions in an inonic compound
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formula unit
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an atom or group of atoms that has a positive or negative charge
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ion
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a compound composed of positive and negative ions
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ionic compound
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in any sample of a chemical compound, the elements are always combined in the same proportion by mass
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law of definitite propertions
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whenever 2 elements from more than 1 compound, the different masses of 11 element that combined with the same mass of the other element aree in the ratio of small whole #'s
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law of multiple proportions
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a natural chemically bonded group of atoms that act as a unit
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molecular
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a compound that is composed of molecues
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molecular compound
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a tightly bound group of atoms that behaves as a unit and charries a charge
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polyatimic ion
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group a on the periodci table
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representative element
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an electron in the highest occupied energy level of an atom
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valence electrons
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atoms react by gaining or losing electrons so as to acquire the stable electron structure of a noble gas, usually eight valence electrons
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octet rule
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