Bradley heated some copper turnings with some sulfur powder very strongly in a test tube . He noticed that at the end of the experiment , there was a bluish color left on the surface of the copper .

Water is initially present in a state where its molecules are far apart. during a change of state, its molecules slow down. which change of state has most likely taken place? from a gas to a liquid from a liquid to a gas from a solid to a liquid from a gas to a plasma

Using the periodic table, complete the following. element: hydrogen symbol: h₂ molecular weight: g mass of one mole: g/mol

This statement about matter and its behavior is best classified as a