Cl, Br, and F K, Ca, and Sc Kr, Cl, and O Be, C, and O
I gave my students this multiple choice question: Which set of elements has similar bonding properties?

Only one answer is correct among these 4 choices:
- Cl, Br, and F
- K, Ca, and Sc
- Kr, Cl, and O
- Be, C, and O

Could you tell me which one is correct?

Cl, Br, and F