Chemistry 2, Ar, Mr and simplest formula
- Created by: Sophie Smith
- Created on: 18-03-13 18:43
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Chemistry 2
Topic 6 - Calcutations
Atomic Mass
The Ar of an element tells us the mass of the nucleus.-
The mass of electrons is ignored because they are too small. So, the Ar tells us the total number of protons and neutrons in that element.
Molecular Mass
The Mr is the relative molecular mass.
For example,
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