Question

Which of the following elements has the smallest value of IE1?

a) B

b) Al

c) Ga

d) In

Answer 1

Aus - (1) In (Indium , Al, Ga, In, elements and are in As mentioned options are ,B all four belongs to p-block same coleum (group) Il trends in periodic table is table Hoosoo I Periodic E increase i.c. As size increases down the group IE dereeses. because the IE, [energy required to remove one electron from last shellfortit of atom] required will be ress are redines of shell will be more from centre (nucler) je. d-orsital Nu p-ortital Sorbital Now, size trend of ginen options are

B< Ala Gac In size increases Ionization Energy decreases. Irenation Energy & size * Group of Boron (B) is B