Question

Predict the formula for ba 2 and s-2.

Answer 1

Answer: The chemical formula for the compound formed will be $BaS$

Explanation:

Barium is the 56th element of the periodic table having electronic configuration of $[Xe]6s^2$

This element looses 2 electrons and thus shows an oxidation state of +2 units.

Sulfur is the 16th element of the periodic table having electronic configuration of $[Ne]3s^23p^4$

This element requires 2 electrons and thus shows an oxidation state of -2 units.

By criss-cross method, the oxidation state of the ions gets exchanged and they form the subscripts of the other ions. This results in the formation of a neutral compound.

Thus, the chemical formula for the compound formed will be $BaS$

Answer 2

$Ba^{2+} + S^{2-}$
$BaS$