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all the elements in 3A group have three valance electrons.
Elements of group IIIA have three valence electrons: B, Al, Ga, etc. form 3+ charged ions.
The group 13 elements all have 3 valence electrons. This group has previously been known as the earth metals and the triels. The elements in this group include boron, aluminum, gallium, indium, thallium, and ununtrium.

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