Final answer:
The compounds held together by ionic bonds from the given list are CaCl2, NaCl, sodium bromide, and FeBr3. CH4 and carbon dioxide involve covalent bonding.
Step-by-step explanation:
The compounds that are held together by ionic bonds are typically formed between a metal and a nonmetal, where the metal loses electrons to become a cation and the nonmetal gains electrons to become an anion. Based on this, the compounds in the given list that are held together by ionic bonds are:
- A.CaCl2 (calcium chloride)
- C. NaCl (sodium chloride)
- D. FeBr3 ( Sodium bromide)
- F. (iron(III) bromide)
Compounds B. CH4 (methane) and E. Carbon dioxide are held together by colvent bond, as they are composed of nonmetals.