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Vinvika [58]
3 years ago
14

What is the mass number of the atom shown? a. 11 b. 18 d. 20 C. 19

Chemistry
2 answers:
PolarNik [594]3 years ago
6 0

Answer:

Explanation:it is 11

Anastasy [175]3 years ago
6 0
It is 20 because the mass is proton + neutron!!! hope this helped :)
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