Chemistry

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Relative atomic mass (Ar)
The weighted average/mean mass of isotopes of an element compared to C-12 = 12
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Relative molecular mass (Mr)
The mass of a molecule calculated by the addition of relative atomic masses of constituent atoms where C-12 = 12
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Molecular formula
A formula that shows the actual number of atoms of each element present in one molecule of a compound.
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Empirical formula
The chemical formula that shows relative number of atoms of each element in substance in smallest whole-number ratios
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Structural formula
A formula that shows the arrangement of atoms and all the bonds in one molecule of a compound.
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Mass number (A)
The total number of protons and neutrons in the nucleus of an atom
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Rate of reaction
The decrease in reactant concentration per unit time.
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Other cards in this set

Card 2

Front

The mass of a molecule calculated by the addition of relative atomic masses of constituent atoms where C-12 = 12

Back

Relative molecular mass (Mr)

Card 3

Front

A formula that shows the actual number of atoms of each element present in one molecule of a compound.

Back

Preview of the back of card 3

Card 4

Front

The chemical formula that shows relative number of atoms of each element in substance in smallest whole-number ratios

Back

Preview of the back of card 4

Card 5

Front

A formula that shows the arrangement of atoms and all the bonds in one molecule of a compound.

Back

Preview of the back of card 5
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