Question

If the radius of the innermost Bohr orbit is 0.53 Å, the radius of the 4^th orbit is ______

Options

• 8.48 Å

• 16 Å

• 81 Å

• 4 Å

Answer 1

If the radius of the innermost Bohr orbit is 0.53 Å, the radius of the 4^th orbit is 8.48 Å.

Explanation:

r₀ = 0.53 Å

Since r_n ∝ n²

∴ `"r"_"n"/"r"_0 = ("n"/1)^2 = (4)^2 = 16`

∴ r_n = 16 × 0.53 = 8.48 Å