07. THE P-BLOCK ELEMENTS (HM)
Explanation:
(d) \({S_2}O_7^{2 - }\)
$\begin{array}{*{20}{c}}
{O\,\,\,\,\,\,\,\,\,\,\,\,\,\,O} \\
{|\,|\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,|\,|} \\
{{}^ - O - S - O - S - {O^ - }} \\
{|\,|\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,|\,|} \\
{O\,\,\,\,\,\,\,\,\,\,\,\,O}
\end{array}$