The position of three elements X, Y and Z in the periodic table are shown below :

(i) Which type of ion, cation or anion, will be formed by element X ?

(ii) Which element, Y or Z, has the atom of comparatively larger size ?

Give reason in each case.

Group 1 Group 2
- -
X -
- -
Y Z
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1 Answers

(i) The valency of X is one, It has a tendency to lose one electron., Therefore, X will form a cation. 

(ii) Y; because atomic radius decreases across a period due to increase in the electrostatic force between electrons and nucleus.

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