First slide

Periodicity in atomic properties

Question

Which of the following represents the correct order of increasing first ionization enthalpy for $Ca, Ba, S, Se and Ar$

Moderate

A

$Ca < S < Ba < Se < Ar$
B

$S < S e < C a < B a < A r$
C

$Ba < Ca < Se < S < Ar$
D

$Ca < Ba < S < Se < Ar$

Solution

Order of increasing $Δ H_{I E_{1}} : B a < C a < S e < S < A r$
$Ba < Ca; Se < S :$ On moving top to bottom in a group, size increases. So ionisation energy decreases.
$Ar$ has Maximum value of ionisation energy, since it is an inert gas.

Get Instant Solutions

When in doubt download our app. Now available Google Play Store- Doubts App

Recieve an sms with download link

Doubts App

OR

SCAN ME

Doubts App

Doubts App