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15-07-2016
Chemistry

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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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EjerciciosFyQ EjerciciosFyQ

15-07-2016

The answer is a. rubidium, because is located in the first group as well.

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