Nicoloveganlee Nicoloveganlee

15-08-2016
Chemistry

Answered

if an atom contains 12 protons and 10 neutrons, what's its mass number?

A12
B10
C22
D2

Verified Answer :

Willchemistry Willchemistry

15-08-2016

A = Z + n

A = 12 + 10

A = 22

Answer C

hope this helps!

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