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

1. a)c-14 has two more protons

2. d)they have different numbers of protons, neutrons, and valence electrons; they are all gases at room temperature.

3. c) iron and nickel.