Question

Elements X, Y, Z have atomic numbers 6,9 and 12 respectively.
(i) Which element has 4 electrons in the valence shell?
(ii)What will be the valency of Y ?
(iii) Which element/s forms a cation ?
(iv) What will be the valency of Z?

Answer 1

Answer:

Explanation:

[i] X has 4 electrons in their valence shell

[ii] 1

][iii] y

[iv] 2

Answer 2

(i) with atomic number 6

(ii) 1

(iii) Z

(iv) 2