Question

The electronic configuration of three elements are given below.Which two elements will combine to form an ionic compound? X - 2 8 2, Y - 2 8 6, Z - 2 8 1

Answer 1

Answer:

X and Y should be combined

Answer 2

The two elements that will combine to form an ionic compound are : X - 2 8 2 & Y - 2 8 6.

Let us have a look at the valencies of the elements given here.

Valency of X = 2

Valency of Y = -2

Valency of Z = 1

Element X has 2 electrons in its outer shell while element Z has 1 electron in its outer shell. So, both these elements will lose these electrons to attain the octet and attain a positive charge.

Element Y has 6 electrons in its outermost shell, hence it will gain 2 electrons in order to complete its octet and will attain a negative charge.

Ions will be formed as-

Element X - $X^{+2}$

Element Y - $Y^{-2}$

Element Z - $Z^{+}$

Thus, $X^{+2}$ and $Y^{-2}$ will combine to form an ionic compound.