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20 Cards in this Set
- Front
- Back
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Acid |
a compound that produces hydrogen ions in a solution |
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Base |
a compound that produces hydroxide ions in a solution |
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Binary Compound |
a compound composed of two elements |
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Law of Definite Proportions |
in samples of any chemical compound, the masses of the elements are always in the same proportions |
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Law of Multiple Proportions |
whenever two elements form more than one compound, the different masses of one element that combine with the same mass of the other element are in the ratio of small whole numbers |
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Monatomic Ion |
a single atom with a positive or negative charge resulting from the loss or the gain of one or more valence electrons |
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Polyatomic Ion |
a tight bound group of atoms that behaves as a unit and has a positive or negative charge |
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Alloys |
a mixture composed of two or more elements, at least one of which is a metal |
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Chemical Formula |
an expression that indicates the number and type of atoms present in the smallest representative unit of a substance |
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Coordinations number |
the number of ions of opposite charge that surround each ion in a crystal |
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electron dot structure |
a notation that depicts valence electrons as dots around the atomic symbol of the element |
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formula unit |
the lowest whole number ratio of ions in an ionic compound |
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halide ion |
a negative ion formed when a halogen atom gains an electron |
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ionic bonds |
the electrostatic attraction that binds oppositely charged ions together |
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ionic compounds |
a compound composed of positive and negative ions |
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metallic bond |
the force of attraction that holds metals together; it consists of the attraction of free floating valance electrons for positively charged metal ions |
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octet rule |
atoms react by gaining or losing electrons so as to acquire the stable electrons structures of a noble gas, usually eight valence electrons |
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valence electrons |
an electron in the highest occupied energy level of an atom |
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molecule |
a neutral group of atoms joined together by covalent bonds |
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polar bond |
a covalent bond between atoms in which the electrons are shared unequally |
