Which pair of elements would be expected to form an ionic bond?

A. nitrogen & oxygen

B. lithium & fluorine

C. carbon & hydrogen

D. silicon & chlorine

lithium and fluorine

Lithium donates an electron to fluorine and make the fluorine with a negative charge and a full outer shell. Lithium consequently get a positive charge and a full outer shell. They then are attracted to each other an form a giant ionic lattice.

Carbon and hydrogen are organic so they don't

Nitrogen and Oxygen are also organic.

Chlorine can form ions but not with silicon

B. lithium & fluorine