The oxidation numbers of nitrogen in nh4+, n2o5, and nano3 are, respectively:

+3, +3, +5

-3, +5, +5

+3, +5, -4

-3, +3, +4

Which of the following observations indicates that there is a small, dense, positively charged part in the center of an atom? some uncharged particles are scattered by a gold foil. all uncharged particles are attracted towards a gold foil. all positively charged particles pass straight through a gold foil. some positively charged particles bounce back from a gold foil.

Which part of earth’s surface receives the most direct rays from the sun? a) equator b) ocean c) poles d) mountains

Which type of intermolecular force is pbr3