Matter And Energy
The basic unit of a chemical element.
The temperature at which a liquid boils and turns to vapor.
Relating to chemistry or the interactions of substances as studied in chemistry.
A usually irreversible chemical reaction involving the rearrangement of the atoms of one or more substances and a change in their chemical properties or composition, resulting in the formation of at least one new substance: The formation of rust on iron is a chemical change.
A property or characteristic of a substance that is observed during a reaction in which the chemical composition or identity of the substance is changed: Combustibility is an important chemical property to consider when choosing building materials.
A process that involves rearrangement of the molecular or ionic structure of a substance, as opposed to a change in physical form or a nuclear reaction.
Ah thing that is composed of two or more separate elements; a mixture.
Conservation Of Mater
The principle that in any closed system subjected to no external forces, the mass is constant irrespective of its changes in form; the principle that matter cannot be created or destroyed. Expand.
(Of a reaction or process) accompanied by or requiring the absorption of heat.