Use the electronegativity table below to choose the pair of elements that will most likely have the more ionic character?Group of answer choicesCa-OSr-OMg-OBa-O

The ionic character of a bond is determined by the difference in electronegativity between the two atoms involved. The greater the difference, the more ionic the bond is.

Here are the electronegativities of the elements mentioned:

• Calcium (Ca): 1.00
• Strontium (Sr): 0.95
• Magnesium (Mg): 1.31
• Barium (Ba): 0.89
• Oxygen (O): 3.44

Now, let's calculate the difference in electronegativity for each pair:

• Ca-O: 3.44 - 1.00 = 2.44
• Sr-O: 3.44 - 0.95 = 2.49
• Mg-O: 3.44 - 1.31 = 2.13
• Ba-O: 3.44 - 0.89 = 2.55

The pair with the greatest difference in electronegativity, and therefore the most ionic character, is Ba-O.