state gov RPSC 2nd Grade Senior Teacher Mock Test Series 2025 Chemistry Structure of Atom Atomic Structure

The ratio of the radii of the first three Bohr orbit is

1

1 ∶ 05 ∶ 033

2

1 ∶ 2 ∶ 3

3

1 ∶ 4 ∶ 9

4

1 ∶ 8 ∶ 27

5

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