Question

Draw an electron dot diagram, showing the lone pair effect for formation of – NH₄⁺ ion from NH³ gas and H¹⁺

Answer 1

H →H⁺ + le^–

1 Proton 1 Proton

1 Electron 0 Electron

Ammonia has one lone pair of electrons which is donated to hydrogen atom forming a co-ordinate bond. The arrow represents a co-ordinate bond. The arrow points from the donor to the receptor atom.