what is the valency of barium
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Barium has 2 e-s in its outer shell., with atomic no. of 56. so the outer most shell contains 2 e-s and these e-s are ready to be lost. Hence the valence of Ba is 2 forming the highly reactive Ba2+…. ... So, barium has a theoretical valency of 2, and it actually has this valency in BaCl2 and BaSO4.
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