What property do the following elements have in common? sulfur, iodine, magnesium

Same Phase at room temp

Explanation:

Here we have a metal and two nonmetals (sulfur and iodine).

They are all solid at room temperature. Metals form cations and are good conductors of electricity. They are not from the same family, therefore, they do not have the same number of valence electrons.

halogen, any of the six nonmetallic elements that constitute group 17 (group viia) of the periodic table. the halogen elements are fluorine (f), chlorine (cl), bromine (br), iodine (i), astatine (at), and tennessine (ts).