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Which is usually the larger number the mass number of an element or the formula mass of a compound that contains the element?
Wiki User
∙ 13y ago
The formula mass of a compound that contains the element would be a larger number than the mass number of the individual element. The individual element would simply be the mass of just that one atom, where as the compound would be the mass of that atom plus the other masses of the other atoms that make up the compound.
ex. Oxygen-O has a mass number of about 16 grams.
Water-H2O has a formula mass of 2 x mass of Hydrogen-H (about 1) + the mass of Oxygen-O 16 = 18 grams.
A formula mass of 18 g is more than a mass number of 16 g.
Wiki User
∙ 13y ago
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