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Question

Chemistry Question on Structure of atom

What is the velocity of electron present in first Bohr orbit of hydrogen atom?

A

2.18×105 m/s2.18 \times 10^5 \,m/s

B

2.18×106 m/s2.18 \times 10^6 \,m/s

C

2.18×10−18 m/s2.18 \times 10^{-18} \,m/s

D

2.18×10−9 m/s2.18 \times 10^{-9} \,m/s

Answer

2.18×106 m/s2.18 \times 10^6 \,m/s

Explanation

Solution

From Bohr?? theory, v=2.18×106×Zn m/sv=2.18\times10^{6}\times\frac{Z}{n}\,m/s =2.1×106×11=2.1\times10^{6}\times\frac{1}{1} =2.18×106 m/s=2.18\times10^{6}\,m/s