Leo ger LOSE ELECTRONS is oxidation Gets more positive

Gain electrons reduction gets more negative.

Increase in oxidation number is oxidation.

Decrease in oxidation number is reduction

Assign oxidation numbers to each element in the following reactions.

Determine whether teach reaction is a redoc reaction.

If the reaction is a redor reaction, determine what is being axidized and what is being, reduced.

Identify the axidizing agent and the reducing ageat in each redox reaction

Oxidation # of element alone is zero

Oxidation # al monatomic ion is its charge

Oxidation Hs of group $1$ and $2$ are $+1$ and $+2$

Oxidation $H$ of $H$ is almost always $+1$

Oxidation H of oxygen is almost aiways $-2$

Fora compound, the sum of oxidation $*$s is zero

For polyatomic ion, the sum of poidation ins is charge of ion

$2P+3H_{2}2P{H}_3$