Write out the formulas for hyrdide compounds formed by Group 1 metal.?

can somebody please help me with this, i really don't take in what this question means and i dont know how to do it. can someone explain, please.
Answers:
NaH

KH
LiH
NaH, LiH, KH etc, Hydrides are formed when hydrogen has a valence of -1. Since 1A's are typically +1, the above compounds form. ok?
a hydride is a hydrogen containing compound where on earth hydrogen takes on an oxidation states of -1 instead of its usual +1.
Group 1 metals always hold an OS of +1.
So, it is really very simple - sodium hydride is NaH, Potassium is KH, etc etc

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