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1 vote
What special group of elements are highly reactive due to having one electron in the outer energy level?

a.alkaline earth metals
b. noble gases
c. halogens
d. alkali metals

1 Answer

1 vote
D. Alkali Metals. You can tell by their group numbers because the group number is the same as the number of electrons they have in their outer energy level. Alkali Metals is the name for Group 1. 
answered
User Sean Kornish
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