Chemistry Examples

$4 A l$

Step 1

The oxidation number for an atom in its elemental form ( $N a, O_{2}, C l_{2}$ ,...) is $0$ .

$A l = 0$

$[\begin{array}{c} x^{2} & \frac{1}{2} \\ \sqrt{π} & \int x d x \end{array}]$