Atoms And Nuclei Question 127

Question: When the wave of hydrogen atom comes from infinity into the first orbit then the value of wave number is [RPET 2003]

Options:

A) 109700 cm?1

B) 1097cm?1

C) 109 cm?1

D) None of these

Show Answer

Answer:

Correct Answer: A

Solution:

Wave number ν¯=1λ=R,[1n12−1n22];

n2=∞

and n1=1
⇒ν¯=R=1.097×107m−1=109700 cm−1

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