Question

The most probable radius (in pm) for finding the electron in $He^{+}$ is

• A. 0.0
• B. 52.9
• C. 26.5
• D. 105.8

Answer 1

Answer: (C)

26.5

Answer 2

Most probable radius = a₀ / Z

where a₀ = 52.9 pm. For helium ion, Z = 2.

r_mp = $\frac{52.9}{2}$= 26.45 pm.