Question

The ratio between total acceleration of the electron in singly ionised helium atom and hydrogen atom (both in ground state) is –

• A. 1
• B. 8
• C. 4
• D. 16

Answer 1

Answer: (B)

8

Answer 2

a = v²/r

\ a µ $\frac{(Z)^{2}}{(1/Z)}$ (for n = 1) or a µ Z³

\ $\frac{a_{1}}{a_{2}}$ = $\left( \frac{2}{1} \right)^{3}$ = 8