wiz-icon
MyQuestionIcon
MyQuestionIcon
12
You visited us 12 times! Enjoying our articles? Unlock Full Access!
Question

The correct arrangement of increasing order of atomic radius among Na, K, Mg, Rb is

A
Mg < K < Na < Rb
No worries! We‘ve got your back. Try BYJU‘S free classes today!
B
Mg < Na < K < Rb
Right on! Give the BNAT exam to get a 100% scholarship for BYJUS courses
C
Mg < Na < Rb < K
No worries! We‘ve got your back. Try BYJU‘S free classes today!
D
Na < K < Rb < Mg
No worries! We‘ve got your back. Try BYJU‘S free classes today!
Open in App
Solution

The correct option is B Mg < Na < K < Rb
Mg < Na < K < Rb. The order is based on the trend in a period and a group. The atomic radius decreases across a period (from left to right). The atomic radius increases down a group due to the addition of a new energy level. Mg lies on the right side of Na and so it is smaller in size than that of Na. K lies below Na in the same group and so, the size of K is greater than that of Na. And similarly, Rb is in the same group of K, Na and lies below K. Hence it has the largest size.

flag
Suggest Corrections
thumbs-up
8
Join BYJU'S Learning Program
similar_icon
Related Videos
thumbnail
lock
Atoms and Molecules
CHEMISTRY
Watch in App
Join BYJU'S Learning Program
CrossIcon