Question

Which of the following atoms forms an ionic bond with a sulfur atom? Cu, Cl, H or I

Answer 1

sulfur has a valency of -2, -4 or -6.and Cu as +1 or +2. Cl and I have -1 and H both +1 and -1 (generally +1).

so I think sulfur can pair up with copper here, right? +2 and -2. and will form CuS.

so Cu it is!

Answer 2

and i 'd rather you posted this in the right section, i.e. Chemistry.