Column 1 row 4 is P. I need help identifiyin the charge for P and Cl.. Thank you

\begin{tabular}{|c|c|c|c|c|c|c|} Symbol & Z & A & #p & #e & #n & Charge \\ \hline Cl & 17 & & & 17 & 18 & \\ \hline Se2 & & 79 & & & & 2 \\ \hline Cr3+ & & & & & 28 & 3+ \\ \hline & 15 & & & 15 & 16 & \\ \hline \end{tabular}