Periodic Classification Of Elements
Quick practice
Question 1 of 5
The ratio of radii of first orbits of H, He+ and Li2+ is:
A
1 : 4 : 9
B
1 : 2 : 3
C
9 : 4 : 1
D
6 : 3 : 2
Get unlimited practice with Foundation subscription
Boost your performance with adaptive practice tests
Practice every concept in the syllabus
Compare your speed and accuracy with your peers
Download the app and practice on the go