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Masses of atoms and molecules
Description
GCSE C2 Mind Map on Masses of atoms and molecules, created by danielberthaur on 19/11/2013.
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danielberthaur
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danielberthaur
almost 11 years ago
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Relative molecular mass
When atoms make molecules the mass of the molecule can be calculated
By adding the relative atomic masses of the atoms that make the molecule up
E.G- PbSO4
P- 207
S-32
O-4
Mr of PbSO4 is 207+32+(4*16)=303
Symbol of Mr
Usually called relative formula mass when talking in terms of ionic compounds
Relative atomic mass
Symbol of Ar
Mass number (Top Number) is the Mass of the element
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