Use the chart to determine which pair of atoms has the greatest difference in electronegativity.

Question

Elements	Electronegativity
aluminum (Al)	1.61
calcium (Ca)	1
carbon (C)	2.55
chlorine (Cl)	3.16
fluorine (F)	4
hydrogen (H)	2.2
iron (Fe)	1.83
nitrogen (N)	3.04
oxygen (O)	3.44
phosphorus (P)	2.19
potassium (K)	0.82
silicon (Si)	1.9
sulfur (S)	2.58

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

Answer 1

So Sarah L.,

Try using the data in the table, and the mathematical operation "subtraction". Always subtract the smaller number from the larger number, you are not interested in a "signed" difference, only an "absolute value" difference.

-- Cheers, -- Mr. d.