Which of these pairs of elements would be most
likely to form an ionic compound?
Select one:
O A. Cl and I
o B. Cl and Mg
O C. Al and Mg
o D. Al and K.
o E. Cand s

The correct answer is  B) Cl and Mg

Explanation:

An ionic bond is produced by the union of a cation and an anion. In this case, Mg would be the cation and Cl the anion. They will form the compound Magnesium Chloride (MgCl2):

Mg + Cl2 > MgCl2

Mg belongs to group 2 of the periodic table, that is, it has two valence electrons. In the case of Cl, it is in group 7 and has seven valence electrons (requires one electron to complete the octet).

b. accuracy of the data matters alot more than its number of digits, organization or amount of detail. quantitative observation is more accepted than the qualitative observation.

i do not get it   at all