Question
Question: The radius of first Bohr orbit in H-atom is r<sub>0</sub>. Then, the radius of the first orbit in si...
The radius of first Bohr orbit in H-atom is r0. Then, the radius of the first orbit in singly ionized helium ion is –
A
r0
B
2r0
C
4r0
D
r0/2
Answer
r0/2
Explanation
Solution
r µ Zn2 (n = same)
r µ 1/Z Ž rHe+= 2rH