Rf मान कैलकुलेटर — सूत्र

Atomic Radius Trend

Approximate Formula

r ∝ n² / Z_eff

In Bohr model terms: r ≈ (n² / Z_eff) × a₀

Where a₀ = 53 pm (Bohr radius)

Where:

n = principal quantum number (shell number)

Z_eff = effective nuclear charge

Atomic radius decreases across a period (Z_eff increases, same n) and increases down a group (n increases faster than Z_eff).