Question

The electron arrange mentions X3-and Y2-are2,8,and 2,8,8respectively.

(a)

Write the electronic arrangement of the elements X and Y.

(2mks)

(b)

Write the formula of the compound that would be formed between

X and Y.

Answer 1

a)X:1s²2s²2p⁶3s²3p⁶ - argon

Y:1s²2s²2p^{6 -} neon

b) Helium, neon and argon do not form chemical compounds and only they can be called true "inert" gases