In group $I$ of the periodic table, three elements $X, Y$ and $Z$ have ionic radii I $33$ pm, $95$ pm, $60$ pm respectively. Giving a reason, arrange these elements in the order of increasing atomic number in the group.

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Solution

The groups extend from top to bottom in a vertical column. The atomic number $(Z)$ increases along a group.
The number of shells increases along a group and due to this the size of elements increases.
The element having larger size will have a larger atomic radius and hence large atomic number.
So, the order of increasing atomic number of the elements of group $I$ will be: $X < Z < Y .$

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In group I of the periodic table, three elements X,Y andZ have ionic radii I 33 pm, 95 pm, 60 pm respectively. Giving a reason, arrange these elements in the order of increasing atomic number in the group.

In group $I$ of the periodic table, three elements $X, Y$ and $Z$ have ionic radii I $33$ pm, $95$ pm, $60$ pm respectively. Giving a reason, arrange these elements in the order of increasing atomic number in the group.