Question

The no of electron and neutron of an electron is 18and20respectively its mass no is

Answer 1

Answer:

38

Explantation:

Mass no.= No. of protons + No. of neutrons

No. of protons = No. of electrons

No. of proton = no. of electron =18

No. of neutron =20

Mass number = P + N

                       =18+20

                       =38

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