Hydrogen has a valence electron. True or false: it is part of the alkali metal group?
Explanation from Alloprof
This Explanation was submitted by a member of the Alloprof team.
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Indeed, hydrogen (H) has a single valence electron. However, it is not part of the alkali metal group. The statement is therefore false.
Admittedly, hydrogen has one valence electron and is located in the first column, just like the other elements of the alkali metal group. However, it sometimes behaves like an alkali earth metal, and at other times like an alkali metal, preventing chemists from assigning it to a group. Hydrogen therefore doesn’t belong to any group. It is one of the special exceptions in the periodic table!
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