An atom of an element contains $29$ electrons and $35$ neutrons. Determine $(i)$ the number of protons and $(ii)$ the electronic configuration of the element.

• A
  $29, 1s^2 2s^2 2p^6 3s^2 3p^6 3d^9 4s^2$
• B
  $29, 1s^2 2s^2 2p^6 3s^2 3p^6 3d^{10} 4s^1$
• C
  $35, 1s^2 2s^2 2p^6 3s^2 3p^6 3d^{10} 4s^1$
• D
  $35, 1s^2 2s^2 2p^6 3s^2 3p^6 3d^9 4s^2$