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The number of unpaired electrons in NH3:

Correct answer: B. 1

  • A. 0
  • B. 1
  • C. 3
  • D. 4

Explanation

Ammonia (NH3) has one unpaired electron. Each hydrogen (H) atom contributes one electron to form a covalent bond with the central nitrogen (N) atom. The nitrogen atom itself has three lone pairs of electrons in its valence shell. One of these three lone pairs is unpaired, making it available for bonding or interactions. This unpaired electron gives NH3 its chemical reactivity and ability to form bonds with other atoms or molecules.

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About Chemical Bonding

Chemical bonding explains molecular shape through VSEPR theory and distinguishes sigma bonds from pi bonds. Questions involve hybridization, bond angles, dipole moment and bond energy, including how electron-pair repulsion determines geometry and how bond polarity differs from the overall polarity of a molecule.

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