Which pair of elements is most likely to chemically combine and form ionic bonds? . a). chlorine and chlorine. b). lithium and chlorine. c). carbon and hydrogen. d). sulfur and oxygen

B). lithium and chlorine

Explanation: An ionic bond is formed between a metal and a non-metal by transfer of electrons from metal to non metal.

Electronic configuration of lithium:

Lithium atom will loose one electron to gain noble gas configuration and form lithium cation with +1 charge.

Chlorine atom has oxidation number of -1.

Electronic configuration of chlorine;

Chlorine atom will gain one electron to gain noble gas configuration and form chloride ion with -1 charge.

combine with to form lithium chloride

the answer is b & c i believe : )