Use the chart to determine which pair of atoms has the greatest difference in electronegativity. A. Ca – Cl
B. H – Cl
C. Fe – Cl
D. P – Cl

A chart was not provided, but I believe that the answer would be A.

The electronegativity for chlorine is 3.2. Now, we must look for the electronegativity that has the greatest difference from chlorine.

Calcium (Ca) - 1.0
Hydrogen (H) - 2.2
Iron (Fe) - 1.8
Phosphorus (P) - 2.2

As you can see, the element with the lowest electronegativity level is Calcium, therefore the greatest difference in electronegativity would be present between Calcium and Chlorine.

Because electrons have negligible mass, to account for the mass of the isotope, there must be 16 neutrons, 16 neutrally charged, massive, fundamental particles present in the sulfur nucleus. and thus finally, if we have the 32s2− ion, there are 18 electrons, 16 protons, and 16 neutrons.