Experiments show that light behaves like as it travels through space.
O sound
O gravity
O + particles
O waves and particles

Silver tarnishes as silver metal reacts with hydrogen sulfide, h2s, in the air. in this reaction, dark silver sulfide, au2s, covers the surface of silver. when silver is polished, this coating of silver sulfide can be removed from the surface. this makes the silver shiny again. enter the coefficients that balance the tarnishing reaction equation. (type 1 for no coefficient.)

Compare and contrast the bohr model and the electron cloud models of the atom.

How many grams of aluminum will there be in 98g of al2o3?