JEE Mains · Chemistry · STD 11 - 2. structure of atom
The value of Rydberg constant \(\left(R_H\right)\) is \(2.18 \times 10^{-18} \mathrm{~J}\). The velocity of electron having mass \(9.1 \times 10^{-31} \mathrm{~kg}\) in Bohr's first orbit of hydrogen atom = _______ \(\times 10^5 \mathrm{~ms}^{-1}\) (nearest integer)
- A \(22\)
- B \(25\)
- C \(30\)
- D \(35\)
Answer & Solution
Correct Answer
(A) \(22\)
Step-by-step Solution
Detailed explanation
\(\mathrm{V}=2.18 \times 10^6 \times \frac{\mathrm{Z}}{\mathrm{n}}\) \(=21.8 \times 10^5 \times \frac{1}{1} \approx 22 \times 10^5 \text { (nearest) }\)
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