Question

two atoms A and B having some atomic number has mass number 208 and 210 respectively if neutrons present in the nucleus of atom A are 126 then calculate the number of the neutrons in atom B and find out its atomic number also​

Answer 1

No of protons in A =208 -126= 82 = no of protons in B

No of neutrons in B 210 -82 =128

Atomic no = no of protons. So atomic no of B is 82

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