What makes the element named iron (Fe) different from the element named nickel (Ni)?
A.
The only difference is the name of the element.
B.
Iron is a solid but nickel is a gas.
C.
Atoms of iron are different from atoms of nickel.
D.
Iron is made of atoms but nickel is not.

Which statement justifies that hydrogen peroxide (h2o2) is a polar molecule? the o – h bond is nonpolar and the molecule is asymmetric. the o – h bond is nonpolar and the molecule is symmetric. the o – h bond is polar and the molecule is asymmetric. the o – h bond is polar and the molecule is symmetric.