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Lithium the first element of group 1 dif...

Lithium the first element of group 1 differs from the rest of the elements of the group in many repects. This anomalous behavious of Li is due to
(i). Very small size of its atom and ions
(ii). High polarizing power (i.e., charge/radius ratio) of `Li^(o+)` ion
(iii). Relatively high electronegativity and high ionization enthalpy
(iv). Absence of vacant d-subshell in its outmost shell

A

(i),(ii)

B

(iii),(iv)

C

(i),(ii),(iii),(iv)

D

(i),(ii),(iii)

Text Solution

Verified by Experts

The correct Answer is:
C
On account of exceptionally smallsize of `Li^(+)` which leads to high charge ensity, metallic bonding is quite strong in Li. This results in its higher meting point and relatively greater hardness. In comparison to compounds of other alkali metals, compounds of Li possess more covalent character because the polarizing power of `Li^(+)` is the greater of all the alkali metals ions.
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