Question

in an atom has atomic number 15 and number of neutrons 16 calculate number of electron in mass number

Answer 1

here number of electrons = 15
and number of protons = 15
therefore mass number = protons + neutrons
=> 15 + 16 = 31 u

Answer 2

HI !

Atomic number = Z = 15

No of protons = Z = 15

No of electrons = No of protons = 15

Mass no: = No of protons + No of neutrons
                = 15 + 16 = 31