Question

an atom with electronic configuration 2,7&mass no.19 will have----neutrons(8,10,12)​

Answer 1

Answer:

Explanation:

Mass no - atomic no

19-9= 10 neutrons

Answer 2

Answer:

10 NEUTRONS

Explanation:

BECAUSE PROTON = ELECTRON = 2 + 7 = 9

MASS NO = PROTON + NEUTRON = 19

                   =  9 + NEUTRON = 19

                    = NEUTRONS = 10

HENCE NEUTRON IS 10

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