Which element has 16 protons in its nucleus

The atomic number of a chemical element is the total number of protons that each atom of that element has.

We must then look for an element that has an atomic number equal to 16.

A chemical element of atomic number 16 is sulfur and its symbol is S.

It is a plentiful non-metal whose color is yellow.

Sulfur

Symbol: S

fe 55.85 g/mol and h2o 18.02 g/mol.