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Chemistry Definitions

1.2.4-1.1.3.10
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cj137
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Last updated: March 28, 2022
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First submittedMarch 28, 2022
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isotopes
atoms which have the same number of protons but different number of neutrons
RFM
average mass of a formula unit relative to 1/12 of the mass of carbon-12
RMM
average mass of a molecule relative to 1/12 of the mass of an atom of carbon-12
first ionisation energy
energy required to convert 1 mole of gaseous atoms into gaseous ions with a single positive charge
second ionisation energy
energy required to convert 1 mole of gaseous ions with a single positive charge into gaseous ions with a double positive charge
octet rule
when reacting, an atom tends to gain, lose or share electrons to achieve 8 in its outer shell
electronegativity
the extent to which an atom attracts the bonding electron in a covalent bond
polar bond
a covalent bond in which there is unequal sharing of bonding electrons
delocalised electrons
outer electrons don't have fixed positions but move freely
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