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secondary 3 | Biology
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do u kno de wae
Do U Kno De Wae

secondary 3 chevron_right Biology

help me with this chem questions pls

Date Posted: 6 years ago
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potato
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2 answers (A Helpful Person)
1st
basically it tests you on mass number = no of protons + neutrons
atomic number = no of protons
charges = no of protons - no of electrons