1.3 Elemental Composition of Pure Substances

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4 Terms

1
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Pure substances are composed of:

Either individual molecules or atoms or ions held together in fixed proportions

2
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Atoms and ions being held together in fixed proportions is described by a:

Formula unit

3
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According to the law of definite proportions, the ratio of the masses of the constituent elements in any pure sample of that compound is:

Always the same

4
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The chemical formula that lists the lowest whole number ratio of atoms of the elements in a compound is the:

Empirical formula