Which of the following are likely to form a covalent bond?

Question

a. Two Gold atoms

b. two neon atoms

c. hydrogen and oxygen atoms

d. magnesium and bromine atoms

Answer 1

c. hydrogen and oxygen atoms

gold forms metalic bonds,  mag and bromine forms ionic bonds. Neon you don't need to know yet.

Its hydrogen and oxygen this forms water and it forms covalent bonds because oxygen is extremely electronegative and a covalent bond is formed by the electronegativity drawing electrons from the the hydrogens to obtain inert noble gas stabilty.