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STEP-BY-STEP EXPLANATION

What to find? Mass number of an element

Given parameters

Number of protons = 15

Number of neutron = 16

Number of electrons = 15

Considering the atomic struc

The formula for calculating the mass number of an element is given below as

[tex]\text{Mass number (A) = Number of protons + Number of neutrons}[/tex]

The next thing is to substitute the

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