1. Tardigrade
  2. Question
  3. Chemistry
  4. STATEMENT - 1: For two ions of the same size and charge, one with an (n-1) dx n s0, electronic configuration will be more polarizing than a cation with an (n-1) s2(n-1) p6 n s°, electronic configuration. STATEMENT - 2: Compounds of Hg 2+ ions having an ionic radius of 116 pm are more covalent in character than those of Ca 2+ ions with almost identical size (114 pm ) and the same charge.

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Q. STATEMENT - 1: For two ions of the same size and charge, one with an $(n-1) d^{x} n s^{0}$, electronic configuration will be more polarizing than a cation with an $(n-1) s^{2}(n-1) p^{6} n s^{\circ}$, electronic configuration.
STATEMENT - 2: Compounds of $Hg ^{2+}$ ions having an ionic radius of $116\, pm$ are more covalent in character than those of $Ca ^{2+}$ ions with almost identical size $(114 \,pm )$ and the same charge.

Classification of Elements and Periodicity in Properties

Solution:

Transition metal ions have pseudo inert gas configuration which have higher polarising power due to poor shielding of d-electrons. Alkali metal and alkaline earth metal ions have less polarising power due to inert gas configuration (more shielding effect of s-and p-electrons as compared to d-electrons).