The radius of electron's second stationary orbit in Bohr's atom is R . The radius of 3 r d orbit…

The radius of electron's second stationary orbit in Bohr's atom is R. The radius of 3rd orbit will be
  1. R3
  2. 2.25 R
  3. 3R
  4. 9R

Solution

As we know, radius of hydrogen like atom r∝n2Z.

Therefore,

r2r3=n2n32

⇒Rr3=232

⇒ r3=94R

=2.25R

Asked in: JEE Main 2023 (31 Jan Shift 2)

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