wiz-icon
MyQuestionIcon
MyQuestionIcon
1
You visited us 1 times! Enjoying our articles? Unlock Full Access!
Question

Which one of the following elements has the least ionisation energy?


A

Cs

Right on! Give the BNAT exam to get a 100% scholarship for BYJUS courses
B

Li

No worries! We‘ve got your back. Try BYJU‘S free classes today!
C

Na

No worries! We‘ve got your back. Try BYJU‘S free classes today!
D

K

No worries! We‘ve got your back. Try BYJU‘S free classes today!
Open in App
Solution

The correct option is A

Cs


Ionisation energy is the minimum amount of energy required to remove the most loosely bound electron i.e the valence electron, of an isolated neutral, gaseous, atom.

Among the given choices, caesium has the largest atomic radius and maximum metallic character. Hence, it is easiest to extract an electron from it, i.e., it has the least ionisation energy.


flag
Suggest Corrections
thumbs-up
0
Join BYJU'S Learning Program
similar_icon
Related Videos
thumbnail
lock
Lines, Lines and More Lines
CHEMISTRY
Watch in App
Join BYJU'S Learning Program
CrossIcon