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p176-177
pages 176 - 177
4
Chemistry
10th Grade
09/12/2011
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Term
What is the standard atom?
 Definition
The atom of the carbon-12 isotope
Term
What is the 'mass' of the standard atom?
 Definition
Exactly 12
Term
What is the relative atomic mass?
 Definition
The average mass of the atoms of the element, using a scale where an atom of carbon-12 has a mass of exactly 12.
Term
what is the relative formula mass?
 Definition
The sum of the relative atomic masses of the elements present in a formula unit.
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