Here are the most likely bond categories for each element pair:
- Rubidium and oxygen - Ionic Bond
- Zinc and zinc - Metallic Bond
- Oxygen and carbon - Covalent Bond
- Fluorine and phosphorus - Covalent Bond
- Bromine and calcium - Ionic Bond
So, the matches are:
- Rubidium and oxygen: Ionic Bond
- Zinc and zinc: Metallic Bond
- Oxygen and carbon: Covalent Bond
- Fluorine and phosphorus: Covalent Bond
- Bromine and calcium: Ionic Bond