Why is "calcium(II) chloride" an improper name for CaCl2? a.) Because this is not an ionic compound. b.) Because the proper name is "calcium dichloride". c.) Because the calcium ion always has a 2+ charge and the "(II)" is unnecessary. d.) Because chlorine is a diatomic element. e.) Because calcium makes an anion when it makes ionic compounds.

c.) Because the calcium ion always has a 2+ charge and the "(II)" is unnecessary.

Explanation:

Why is "calcium(II) chloride" an improper name for CaCl₂?

a.) Because this is not an ionic compound. NO. This is an ionic compound.

b.) Because the proper name is "calcium dichloride". NO. The proper name is calcium chloride.

c.) Because the calcium ion always has a 2+ charge and the "(II)" is unnecessary. YES.

d.) Because chlorine is a diatomic element. NO. This is unrelated to the name of the compound.

e.) Because calcium makes an anion when it makes ionic compounds. NO. Calcium makes a cation with 2+ charge.

radioactive decay occurs in unstable atomic nuclei – that is, ones that don't have enough binding energy to hold

the nucleus together due to an excess of either protons or neutrons.

i believe you are right for all except the 3rd ( look at sqdancefan his answer is much better)