Question

i) how to calculate the atomic no.
ii) what is the mole concept?

Answer 1

hey there !!

Atomic no is the number of electron or portion present in an atom...

for ex:- oxygen (O) we know oxygen have 8 electrons so atomic no is 8..

mole concept:-

=) It is a chemical calculation which we do for calculating animic mass,no of atoms , molecular weight ..bcoz atoms are very small so we can't apply general rules for calculation..

One mole = 6.022 ×10^23 moles

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hope it will help u