To match the molecules or compounds to the type of bond found between their elements:
- NaCl - b. ionic bond
- MgBr2 - b. ionic bond
- CO2 - a. covalent bond
- SO2 - a. covalent bond
So, the matches are:
- NaCl → ionic bond
- MgBr2 → ionic bond
- CO2 → covalent bond
- SO2 → covalent bond