What do the ions K+, Ca2+, and Cl- have in common?
a. They have the same number of protons.
b. They will form covalent bonds with oxygen.
c. They have the same electron configuration as argon.
d. They are larger than their corresponding atoms.
c. They have the same electron configuration as argon.
The ions K+, Ca2+, and Cl- have the same electron configuration as argon after losing or gaining electrons to achieve a stable, noble gas configuration.
