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The element hydrogen has one valence electron. which of the following elements also has only one valence electron? a. rubidium b. helium c. scandium d. krypton
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The element hydrogen has one valence electron. which of the following elements also has only one valence electron?

a. rubidium
b. helium
c. scandium
d. krypton

User Adrian Panasiuk
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1 Answer

4 votes
The answer is a. rubidium, because is located in the first group as well.
User Memoalv
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