An atom containing 16 electrons and 16 neutrons is represented as

Consider that the neutral atom has 16 electrons and 16 neutrons.

Hence, its atomic number (Z) should be 16 because it has 16 protons.

The symbol of nuclide is ${ }_{16}^{32}\text{A}$.

$\text{Z}=\text{Atomic\hspace{0.17em}number}=\text{no.of\hspace{0.17em}electrons}\left(\text{or}\right)\text{no.of\hspace{0.17em}protons}$

$\text{A}=\text{Mass\hspace{0.17em}number}=\text{no.of\hspace{0.17em}protons}+\text{no.of\hspace{0.17em}neutrons}$

$\text{A}=\text{P}+\text{n}=16+16=32$.