Question

-CHEM 1411 Sections 310&313 Spring 20 - REMLINGER > Activities and Due Dates > Bonding Theory Resources Assignment Score: 48.2% Question 12 of 22 > Highest ionization energy Lowest ionization energy about us career privacy policy Terms of use contact us help o te . . . . . . . . . ..... . . . . . . .. . .

Answer 1

sol:-

ionisation energy :- energy require to remove electron from outermost orbit.

ionisation energy depends upon following factor:-

• it decrease when the shell number or radius of any element increase
• it increases if Zeff (net attraction of electron in orbital) increases.
• it is high for half and fully filled orbital.
• it also depends upon orbital as follows, s > p > d > f

from question,

electronic configuration of :-

Ca = [Ar] 4s2

Ga = [Ar] 4s2 3d10 4p1

K = [Ar] 4s1

Ge = [Ar] 4s2 3d10 4p2

As = [Ar] 4s2 3d10 4p3

Se = [Ar] 4s2 3d10 4p4

Br = [Ar] 4s2 3d10 4p5

Kr = [Ar] 4s2 3d10 4p6

all these element are from same period so along period Zeff increases so ionisation energy will also increase

​​​​​​​so ionisation energy trend is :-

Kr > Br > As > Se > Ge > Ca > Ga > K

Ca > Ga because Ca is fully filled and Ga is not fully filled.

As > Se because As is half filled while Se is not half filled it can be half filled by loosing one electron.