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23 Cards in this Set
- Front
- Back
Atom (2.5)
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smallest unit of matter
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Atomic Mass (2.7)
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mass of an atom of an element in atomic mass units (amu's)
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Atomic Number (2.5)
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number of protons in the nucleus of an atom of a given element
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Binary Compounds (2.9)
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compound that contains two elements
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Compounds (2.3)
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matter that has been broken down by chemical means into more than one element
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Diatomic Elements (2.5)
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??
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Dissociate (2.10)
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(1) seperation of a molecule into two or more fragments, producing no new substance, (2) the process of decomposition of a crystal into hydrated ions
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Distillation (2.1)
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process used to drive vapor from liquid by heating
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Electrolysis (2.3)
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process whereby an external source of electricity causes nonsponaneous redox reactionto occur and causes a substance to decompose into new matter
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Elements (2.3)
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substances composed of a single type of atom
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Formula Unit (2.8)
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smallest whole-number ratio of each element in a compound
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Ions (2.5)
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particle that has electrical charge
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Law of Definite Composition (2.4)
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principle stating that, in contrast to a mixture, a compound has a definite composition
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Law of Multiple Proportions (2.4)
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explanation of why the same elements can form two ro more compounds, each with a different, but definite composition
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Metalloids (2.7)
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nonmetallic element that can combine with a metal to form an alloy, often called semiconductors
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Metals (2.7)
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solid, opaque substance, good conductor of heat and electricity
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Mixture (2.1)
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matter that can be separated into component parts
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Molecules (2.5)
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uncharged particles made up of more than one atom
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Noble Gases (2.7)
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nonmental element not generally combinable with other elements
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Nonmetals (2.7)
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elements that do not reflect light and are poor conductors of heat and electricity
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Polyatomic Ion (2.11)
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a group of atoms with a charge
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Solutions (2.1)
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a substance (solid, liquid, or gas) that is evenly dispersed throughout another substance
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Subscript (2.8)
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number used in a chemical formula to represent the smallest whole-number ratio of each element
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