Chemistry Definitions

1.2.4-1.1.3.10

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Last updated: March 28, 2022

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First submitted	March 28, 2022
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Hint	Answer
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

Hint	Answer
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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