NEET2022Chemistry-Atomic Structure
NEET 2022 Chemistry Bohr Model MCQ Question
Type: MCQ-numerical-Medium-Class 11
If radius of second Bohr orbit of the He⁺ ion is 105.8 pm, what is the radius of third Bohr orbit of Li²⁺ ion?
A
1.587 pm
B
158.7 Å
C
158.7 pm
D
15.87 pm
Correct Answer
Option C
Detailed Explanation
The radius of the nth orbit in a hydrogen-like atom is given by r = n²a₀/Z, where a₀ is the Bohr radius. For Li²⁺, Z = 3, and for the third orbit, n = 3. Calculating gives r = 158.7 pm.
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