The radius of the second Bohr orbit for hydrogen atom is :
(Planck’s Const. h=6.6262×10−34 Js;
mass of electron=9.1091×10−31 kg;
charge of electron e=1.60210×10−19 C;
permittivity of vacuum =8.854185×10−12 kg−1m−3A2)
0.529 Å
2.12 Å
1.65 Å
4.76 Å
As we learnt in
Bohr radius of nth orbit -
where Z is atomic number
-
given that n = 2 and z = 1
r = .529 X 22 / 1 = 2.12 A0
Hence, the correct option is 2
Option 1)
0.529 Å
Incorrect option
Option 2)
2.12 Å
Correct option
Option 3)
1.65 Å
Incorrect option
Option 4)
4.76 Å
Incorrect option
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