Question

a balanced equation for chemical combination reaction in which a metal react with non metal

Answer 1

The chemical equation can be :
4Na + O2 ========> 2 Na2O

You can also write Mg, Ca or Al in place of Na, they will also form their oxides.

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Answer 2

A balanced equation for chemical combination reaction in which a metal react with nonmetal is as follows:

$\bold{\mathrm{Li}+\mathrm{H} \rightarrow \mathrm{LiH}}$

Explanation:

Here, Lithium is metal and Hydrogen is nonmetal.

A reaction in which two or more substances which is either elements or compounds combine together to form a new substance is called chemical combination reaction. The reaction of both elements generally forms ionic bond.

The general chemical combination reaction is as follows:

$A+B \rightarrow A B$