Answer:

16 neutrons

Explanation:

given, atomic mass = 31

atomic no. = no. of electrons present in an element.

no. of electrons= 15

we know that, no.of electrons = no.of protons = 15

let, no. of neutrons = N

now, N = total mass - no. of protons

N = 31 - 15

N = 16.

I hope it helped u. thanku :-)

Answer:

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