In the hydrogen atom, the electron is moving around the nucleus with velocity $2.18 \times {10}^6 \mathrm{m} {\mathrm{s}}^{-1}$ in an orbit of radius $0.528 \stackrel{\circ }{\mathrm{A}}$. The acceleration of the electron is

• A

  $9 \times {10}^{18} \mathrm{m }{\mathrm{s}}^{-2}$
• Correct answer
  B

  $9 \times {10}^{22} \mathrm{m }{\mathrm{s}}^{-2}$
• C

  $9 \times {10}^{-22} \mathrm{m }{\mathrm{s}}^{-2}$
• D

  $9 \times {10}^{12} \mathrm{m }{\mathrm{s}}^{-2}$

Hence, the correct answer is option: 'B'.