Answer
Ion symbol for the ion is = $P^{3-}$
Work Step by Step
From the molecular art picture it is shown that
the no. of protons = 15. Hence, the element is phosphorus (P).
No. of electrons = 18.
hence, charge on the element = (15-18) = -3.
Hence, the ion symbol is $P^{3-}$
Also, no. of neutron in this ion = 16.
