In chemistry, what are the most vital compound formulas to memorise?

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D.SHA64
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In Alevel chemistry, what are the most vital compound formulas to memorise?
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Rj2018
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depends if you are GCSE or A level
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D.SHA64
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(Original post by Rj2018)
depends if you are GCSE or A level
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(Original post by D.SHA64)
In Alevel chemistry, what are the most vital compound formulas to memorise?
Ideally, you should learn all the ionic charges on one atom/multi-atom ions, and then be able to come up with the formula yourself for most ionic compounds.
Covalent compounds, well all the organic stuff is a must.
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