Question

Hydrogen when combined with metals the is -1 or +1

Answer 1

Answer:

When hydrogen combines with metals, its oxidation state is $-1$.

Hope this helps you.

Answer 2

Answer: -1

Explanation:

When Hydrogen combines with metals its oxidation state is -1 and oxidation state of metal is +1.

Examples:-

LiH , CaH2 , NaH etc...

Happy to help ☺️