As a group, all of the f-block elements (those that use their remaining electrons to fill an f sublevel orbital) are known as the . a.
actinide series
c.
lanthanide series
b.
inner transition metals
d.
transition metals

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.