Question

Variable valency is exhibited by:

• A. normal elements
• B. metallic elements
• C. transitional elements
• D. non-metallic elements

Answer 1

Answer: (C)

transitional elements

Transitional elements exhibit variable valency as transition elements have both s electrons of outermost shell and d electrons of the penultimate shell. By losing some s and d electrons these elements can achieve intermediate stable half-filled and full filled configuration. Due to the above reason, transition elements show variable oxidation states.

Hence, option C is correct.