Chemistry

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Ions
A positively or negatively charged atom or (covalently bonded) group of atoms (a molecular ion)
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Isotopes
Atoms of the same element with different numbers of neutrons
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Atomic Number
Number of protons in the nucleus of the atom
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Mass (nucleon) Number
The number of particles (protons and neutrons) in the nucleus.
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Relative Isotopic Mass
The mass of an atom of an isotope compared with 1/12 of the mass of carbon-12
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Relative Atomic Mass
(Ar) he weighted mean mass if an atom of an element compared with 1/12 of the mass of an atom of carbon-12
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Relative Molecular Mass
(Mr) The weighted mean mass of a molecule compared with 1/12 of the mass of an atom on carbon-12
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Relative Formula Mass
The weighted mean mass of a formula unit compared to 1/12 of an atom of carbon-12
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Other cards in this set

Card 2

Front

Atoms of the same element with different numbers of neutrons

Back

Isotopes

Card 3

Front

Number of protons in the nucleus of the atom

Back

Preview of the back of card 3

Card 4

Front

The number of particles (protons and neutrons) in the nucleus.

Back

Preview of the back of card 4

Card 5

Front

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

Back

Preview of the back of card 5
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