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Relative Formula Mass:
The weighted mean mass of a formula unit compared with one-twelfth of the mass of an atom of carbon-12.
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Relative Atomic Mass:
The weighted mean mass of an atom of an element compared with one-twelfth of the mass of an atom of carbon-12.
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Relative Isotopic Mass:
The mass of an atom of an isotope compared with one-twelfth of the mass of an atom of carbon-12.
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Relative Molecular Mass:
The weighted mean mass of a molecule compared with one-twelfth of the mass of an atom of carbon-12.
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Isotope:
atoms of the same element with different numbers of neutrons and different masses
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Atomic Number:
the number of protons in the nucleus of an atom.
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Mass Number:
the number of particles (protons and neutrons) in the nucleus.
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Ion:
a positively or negatively charged atom or (covalently bonded) group of atoms (a molecular ion)
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Card 2

Front

The weighted mean mass of an atom of an element compared with one-twelfth of the mass of an atom of carbon-12.

Back

Relative Atomic Mass:

Card 3

Front

The mass of an atom of an isotope compared with one-twelfth of the mass of an atom of carbon-12.

Back

Preview of the back of card 3

Card 4

Front

The weighted mean mass of a molecule compared with one-twelfth of the mass of an atom of carbon-12.

Back

Preview of the back of card 4

Card 5

Front

atoms of the same element with different numbers of neutrons and different masses

Back

Preview of the back of card 5
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