CameraIcon
CameraIcon
SearchIcon
MyQuestionIcon
MyQuestionIcon
1
You visited us 1 times! Enjoying our articles? Unlock Full Access!
Question

What is the increasing order of atomic sizes for the elements Li, Na, K?

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

The correct option is B Li < Na < K
  • The atomic radius is the distance between the nucleus of an atom and its outermost orbit.
  • The atomic numbers of Li, Na, K are 3, 11 and 19 respectively.
Element Electronic Configuration
Lithium (Li) 2,1
Sodium (Na) 2,8,1
Potassium (K) 2,8,8,1

Since, a new shell gets added while going from lithium to potassium.
Hence, the size of the atom increases gradually in the order Li < Na < K.

flag
Suggest Corrections
thumbs-up
11
Join BYJU'S Learning Program
similar_icon
Related Videos
thumbnail
lock
Huygen's Principle
PHYSICS
Watch in App
Join BYJU'S Learning Program
CrossIcon