Chem 1 definitions

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Atomic number
the number of protons in an atom
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mass number
number of protons and neutrons in an atom
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isotope
an atom with the same number of protons but a different number of neutrons
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relative atomic mass
the average mass of all isotopes of an element divided by 1/12 the mass of a c-12 atoms
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first ionisation energy
the energy needed to remove one electron
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second ionisation energy
the energy needed to remove one electron from a gaseous 1+ ion to make a gaseous 2+ ion
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covalent bond
a shared pair of electrons (one from each atom)
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coordinate bond
two electrons shared, both from the same atom
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polar bond
an equally shared electron pair
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electronegativity
the ability of an atom to attract electrons in a covalent bond to its nucleus
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saturated
contains the maximum number of hydrogen bonds
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hydrocarbon
a molecule only containing hydrogen and carbon
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relative molecular mass
the average mass of all molecules divided by 1/12 of the mass of a c-12 atom
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molecular formula
the actual number of atoms of each element in a molecule
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empirical formula
the simplist whole number ratio of the atoms of each element in a compound
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structural isomer
compounds with the same molecular formula but different structures
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position isomer
the functional groups are in different positions on the chain
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chain isomer
structural isomers with different carbon chains
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functional group isomer
structural isomer with different functional groups
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Other cards in this set

Card 2

Front

number of protons and neutrons in an atom

Back

mass number

Card 3

Front

an atom with the same number of protons but a different number of neutrons

Back

Preview of the back of card 3

Card 4

Front

the average mass of all isotopes of an element divided by 1/12 the mass of a c-12 atoms

Back

Preview of the back of card 4

Card 5

Front

the energy needed to remove one electron

Back

Preview of the back of card 5
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