the number of protons in the nucleus of an atom
atomic number (Z)
total number of nucleons in an atom
mass number (A)
protons and neutrons in the nucleus
nucleons
any of several forms of an element that have different mass numbers
isotopes
atom or molecule that has a different number of electrons and protons, and therefore has an electric charge
ion
negatively charged ion
anion
positively charged ion
cation
mass of a single atom
atomic mass
the atomic mass unit (u) is ______ of the carbon-12 atom
1/12
instrument used to measure atomic masses with high precision
mass spectrometer
average mass of an element’s atoms, based on the naturally occurring mixture of isotopes
average atomic mass
ratio of average atomic mass to 1 u
atomic weight
symbolic representations that specify the elements present in a compound and the relative number of atoms of each element present
chemical formulas
compounds composed of distinct units called molecules
molecular compounds
compounds composed of a vast array of ions
ionic compounds
formula that tells how many of each type of atom are found in an actual molecule of that substance
molecular formula
shows the simplest ratio of atoms in a compound
empirical formula
simplest ratio of atoms in an ionic compound
formula unit
a ______ contains atoms of only two elements
binary compound
the smallest division of an ionic compound
formula unit
consists of several atoms that act as a single ion
polyatomic ions
used to name simple cations
Stock system
the name of an ionic compound consists of the name of the _____ first
cation, then anion
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pages 1-10 quiz35
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11-1636
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test 195
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mas info90
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40-5023
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ch 415
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test 246
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5.1-5.228
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test 3126
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6.1-236
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test 465
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7.1-255
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7.3-8.229
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9.1-9.237
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MIDTERM99
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9.322
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10.1-10.245
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10.2 - continued42
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test 7105
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11.320
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11.2-350
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12.1-229
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test 8110
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12.4-13.140
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test 9119
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test 1032
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strong acids and bases4
