The state of matter which is hard and rigid
The smallest unit of matter which can exist independently
The distance between the molecules of a substance
The temperature at which a solid melts or changes into its liquid state
The amount of heat required by a substance to change its state of matter without any change in the temperature
The smallest unit of an element which may or may not have an independent existence but always takes part in a chemical reaction
The energy possessed by the molecules of a fluid which is a direct measure of the temperature of that fluid
The force of attraction that exists between similar kinds of molecules
The state of matter which expands most on heating
The process by which a gas changes into its solid state, without changing to its liquid state
