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AP EAMCET202418 May 2024Morning ShiftChemistryChemical Bonding and Molecular StructureActual

The correct formula used to determine the formal charge ( Q _ f ) on an atom in the given Lewis structure of a molecule or ion is ( V = number of valence electrons in free atom, U = number of unshared electrons on the atom, B = number of bonds around the atom)

Options

  1. AQ _ f = V - ( U B )
  2. BQ _ f = V +( U - B )
  3. CQ _ f = V -( U + B )
  4. DQ _ f = V - ( B U )

Correct answer

C. Q _ f = V -( U + B )

Step-by-step solution

Formal charge (Q_f ) on an atom =[ Total number of valence electron in the free atom (v)] -[total number of non bonding/unshared electron] -[number of bond around the atom] aligned & Q_f=V-(U)-(B) & Q_f=V-(U+B) aligned

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