If a metal ion $M^{3+}$ loses three more electrons,what will be its final oxidation number?

Explain the Stock notation theory with examples.

What is the oxidation state of phosphorus in $Ba(H_2PO_2)_2$?

$A$ compound contains $x$,$y$,and $z$ atoms. The oxidation number of $x$ is $+3$,$y$ is $-5$,and $z$ is $+1$. The possible formula of the compound is:

If an $M^{3+}$ ion loses $3e^-$,what will be its final oxidation number?

What is the oxidation state of nitrogen in $N_3H$?