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.

Atp, shorthand for adenosine triphosphate, is the standard molecule for cellular enger in the human body. all motion and metabolic  processes  within the body begins with energy that is released from  atp, as its phosphate bonds are broken in cells through a  process  called hydrolysis.

As long as you're breathing, you'll be fine : /p. s. if you aren't breathing, you'll pass out. mark as brainliest.