Question

(ii) Assertion: Chemical reactivity is maximum at the extremes and lowest in the centre of the periodic table Reason: Extreme left is exhibited by the loss of an electron leading to the formation of cation and at the extreme right shown by the gain of an electron forming an anion. (a) Assertion and reason both are correct statements and reason is correct explanation for assertion. (b) Assertion and reason both are correct statements. But, reason is not correct explanation for assertion. (c) Assertion is correct statement. But, reason is wrong statement. (d) Assertion is wrong statement. But, reason is correct statement.​

Answer 1

Answer:

Least ionisation enthalpy on the left and highest negative electron gain enthalpy on the right.

High chemical reactivity of alkali metals is due to low ionisation energies. Alkali metals readily lose an electron and form cation with stable noble gas electronic configuration. High chemical reactivity of halogens is due to high negative electron gain enthalpies. Halogens readily accept an electron and form anion with stable noble gas electronic configuration.