The answer for this multiple choice question is C
no it is not possible, because they both have the same number of valence electrons in each element. in a compound you are supposed to have two or more elements that have different numbers of valence electrons so when put together they for a compound.
Pasteurization, vaccines against antrax and rabies, discovered the germ fermentation
In a crystal, the molecules are closer together as they are in any solid. they have less room to move, and might even be combined together rather than individual