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23 Cards in this Set

  • Front
  • Back
Atom (2.5)
smallest unit of matter
Atomic Mass (2.7)
mass of an atom of an element in atomic mass units (amu's)
Atomic Number (2.5)
number of protons in the nucleus of an atom of a given element
Binary Compounds (2.9)
compound that contains two elements
Compounds (2.3)
matter that has been broken down by chemical means into more than one element
Diatomic Elements (2.5)
??
Dissociate (2.10)
(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
Distillation (2.1)
process used to drive vapor from liquid by heating
Electrolysis (2.3)
process whereby an external source of electricity causes nonsponaneous redox reactionto occur and causes a substance to decompose into new matter
Elements (2.3)
substances composed of a single type of atom
Formula Unit (2.8)
smallest whole-number ratio of each element in a compound
Ions (2.5)
particle that has electrical charge
Law of Definite Composition (2.4)
principle stating that, in contrast to a mixture, a compound has a definite composition
Law of Multiple Proportions (2.4)
explanation of why the same elements can form two ro more compounds, each with a different, but definite composition
Metalloids (2.7)
nonmetallic element that can combine with a metal to form an alloy, often called semiconductors
Metals (2.7)
solid, opaque substance, good conductor of heat and electricity
Mixture (2.1)
matter that can be separated into component parts
Molecules (2.5)
uncharged particles made up of more than one atom
Noble Gases (2.7)
nonmental element not generally combinable with other elements
Nonmetals (2.7)
elements that do not reflect light and are poor conductors of heat and electricity
Polyatomic Ion (2.11)
a group of atoms with a charge
Solutions (2.1)
a substance (solid, liquid, or gas) that is evenly dispersed throughout another substance
Subscript (2.8)
number used in a chemical formula to represent the smallest whole-number ratio of each element