Ablock of wood has a volume of 55 cm3 and a mass of 550 g. what would be its density? answer in units of g/cm3.

What happens to isotopes that are unstable?

Which sentence about particles in matter is true? a. atoms are present in solids and liquids but not in gases. b. the particles of matter are in constant motion. c. the same kinds of atoms are found in different elements. d. when a solid changes to a liquid, the sizes of the particles change.

What is the lowest number energy level where a d sublevel is found