Each hydrogen atom has one valence electron, but it needs two electrons to be stable. How can both hydrogen atoms each achieve a stable configuration

Through Covalent Bonding

Explanation:

Both Hydrogen can achieve a stable configuration with 2 electrons by each sharing their electrons.

The name of this bonding is called covalent bonding. In this type of bonding, each participating entity (in this case, the hydrogen atoms) donates their valence electrons (the one valence electron in the hydrogen atoms) then share the total electrons (1 + 1 = 2).

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