Element Type of ion formed in a chemical reaction Phase at room

temperature

Reactivity
W

positive

solid highly reactive
X

does not form ions

gas non-reactive
Y

negative

gas highly reactive
Z positive liquid

somewhat reactive

Using your knowledge of periodic properties and trends, how would these elements BEST be classified and why?

A.
Elements W and Z are nonmetals, Elements X and Y are metals, but Element Y is in Group 1 (alkali metal).

B.
Elements W and Z are metals, Elements X and Y are nonmetals, but Element Y is in Group 18 (noble gas).

C.
Elements W and Z are metals, Elements X and Y are nonmetals, but Element X is in Group 18 (noble gas).

D.
Elements W and Z are nonmetals, but Element W is in Group 17 (halogen). Elements X and Y are metals.