Definitions

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  • Created by: killjoy98
  • Created on: 28-12-14 20:30
isotopes
Atoms of the same element with same numbers of electrons and protons but different numbers of neutrons.
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An ion
a positevely or negatively charged ion or a group of covalently bonded atoms.
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relative isotopic mass
mass of an atom of an isotope compared with 1/12 of mass of carbon-12
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relative atomic mass
weighted mean mass of an atom of an element compared with 1/12 of the mass of an atom of carbon-12
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a mole
is the amount of any substance containing as many particles as there are carbon atoms in exactly 12g of carbon-12 isotope
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the avogadro constant
is the number of atoms per mole of the carbon-12 isotope
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amount of substance
the quantity whose unit is a mole
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emperical formula
is the simplest whole-number ratio of atoms of each element present in a compound
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molecular formula
is an actual number of atoms of each element in a molecule
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molecule
is a small group of atoms held together by covalent bonds
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molar volume
is the volume per mole of a gas
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stoichiometry
is the molar relationship between the relative quantities of substances taking part in a reaction
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acid
a species that is a proton donor
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base
a species that is a proton acceptor
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alkali
a type of base that dissolves in water to make hydroxide ions, OH(aq) ions
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salt
any chemical compound formed from an acid when a H ion from the acid is replaced by a metal ion or another positive ion, such as the ammonium ion, NH
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Card 2

Front

a positevely or negatively charged ion or a group of covalently bonded atoms.

Back

An ion

Card 3

Front

mass of an atom of an isotope compared with 1/12 of mass of carbon-12

Back

Preview of the back of card 3

Card 4

Front

weighted mean mass of an atom of an element compared with 1/12 of the mass of an atom of carbon-12

Back

Preview of the back of card 4

Card 5

Front

is the amount of any substance containing as many particles as there are carbon atoms in exactly 12g of carbon-12 isotope

Back

Preview of the back of card 5
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