Atoms and electron structure - key definitions - Flashcards in A Level and IB Chemistry

Isotopes

Atoms of an element with different numbers of neutrons and different masses.

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Relative atomic mass

average mass of an atom relative to 1/12 of the mass of a carbon-12 atom.

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Relative isotopic mass

mass of a particluar isotope relative to 1/12 of the mass of a carbon-12 atom.

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Orbital

A region that can hold up to two electrons with opposite spins.

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First ionisation energy

Energy change when one mole of electrons is removed form one mole of gaseous atoms.

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Successive ionisation energy

Energy change when one mole of electrons is removed from one mole of gaseous positively charged ions.

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Other cards in this set

average mass of an atom relative to 1/12 of the mass of a carbon-12 atom.

Relative atomic mass

mass of a particluar isotope relative to 1/12 of the mass of a carbon-12 atom.

A region that can hold up to two electrons with opposite spins.

Energy change when one mole of electrons is removed form one mole of gaseous atoms.

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