What must be true of a disproportionate substance? A. It is composed of oxygen.

B. It is both a reactant and a product.

C. It has an oxidation number of 0.

D. It gains and loses electrons.

Which process does not require the presence of a physical substance in order to transfer heat? air in the atmosphere is heated by the ground. this warm air then rises, and cooler air falls. this is an example of what type of process? how is conduction different from radiation?

What type of organic molecule comprises the majority of a potato?

As we move from left to right across the periodic table, what is the general trend? a) atomic radii increase. b) electronegavitiy decreases. c) nuclear shielding increases. d) metallic character decreases.