Valence electrons in the element A are 3 and that in element B are 6 . Most probable compound formed from A and B is

Step-by-step solution

Valence electrons in A = 3 Valence electron in B = 6 Thus, A is electropositive and B is electronegative, A can lose three electrons and B can gain two electrons to attain stable configuration. Hence, A exist as A 3 + and B as B 2 - ∴ Compound formed is A 2 B 3