In the reaction NH3 + H+ → NH4+, the bond formed results from?

  • A an electron transferred from NH3 + H+
  • B an electron pair donated by NH3
  • C an electron pair equally shared
  • D an electron pair donated by H+
  • E an electron tarnsferred from H+ to NH3
jamb 1982chemistry

The correct answer is B. an electron pair donated by NH3

The nitrogen atom has a lone pair of electrons that coordinates to the hydrogen cation, which has zero electrons, forming a covalent bond.

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