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Question

Calculate the radius of Bohr's first orbit for hydrogen atom and the energy of electron in this orbit:
  1. -2.178 × 1018 J
  2. 21.78 × 1018 J
  3. 2.170 × 1018 J
  4. 21.88 × 1018 J

A
2.170 × 1018 J
B
-2.178 × 1018 J
C
21.78 × 1018 J
D
21.88 × 1018 J
Solution
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As we know,
rn = n2h24π2me2Kr1

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