Question

why ionisation enthalpy decreases in gr^13 ?​

Answer 1

Answer:

You might have learn than on going down the group ionisation energy decreases. It is because atomic size increases, hence less amount of energy is required to remove the outermost electron, but….. a huge but, Chemistry is the world of exceptions.

Answer 2

Answer:

Properties and Periodic Trends. These elements are found in Group 13 (XIII) of the p block in the Periodic Table of Elements. ... Ionization Energy decreases going down the group (because the electrons are farther from the core and therefore are easier to remove; Tl does not fit this trend)*Jun 5, 2019