Quantum chemistry calculations can predict the value of the partial charge on an atom when bonded to other atoms, i.e. the excess or deficiency of electrons compared to the number of protons around the atom. A quantum chemistry calculation for SCl₂ (with the sulfur as the central atom) was performed, and the calculation gave partial charges of –0.402 for the sulfur atom and 0.201 for both chlorine atoms.

• Based on these results, sulfur has
  a more negative

  the same

  a more positive
  electronegativity than chlorine. [1 mark]

• If a similar calculation was done for water, the magnitude of the partial charge on oxygen would be 
  more negative than

  the same as

  more positive than
  the partial charge of sulfur in SCl₂. [1 mark]