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Which of the following groups contains reactive elements that need to gain only one electron to have a full outer energy level? alkali metals alkaline earth metals halogens noble gases
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Which of the following groups contains reactive elements that need to gain only one electron to have a full outer energy level?

alkali metals
alkaline earth metals
halogens
noble gases

User Bill Berlington
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1 Answer

7 votes
Alkali metals (group 1A elements)
User James Ralston
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