SATHEE: Atoms - Result Question 37

Atoms - Result Question 37

39. When hydrogen atom is in its first excited level, its radius is

[1997]

(a) four times its ground state radius

(b) twice

(d) half

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Answer:

Correct Answer: 39. (a)

Solution:

(a) $R = \frac{R_{0} n^{2}}{Z}$

Radius in ground state $= \frac{R_{0}}{Z}$

Radius in first excited state $= \frac{R_{0} \times 4}{Z} (∵ n = 2)$ Hence, radius of first excited state is four times the radius in ground state.

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Atoms - Result Question 37

39. When hydrogen atom is in its first excited level, its radius is

Answer:

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