what is the law of conservation of matter

He wrote that a body of matter is able to change, but is not able to disappear. 1 Historical development and importanceĪn early yet incomplete theory of the conservation of mass was stated by Nasīr al-Dīn al-Tūsī (1201-1274) in the 13th century.This historical concept is widely used in many fields such as chemistry, mechanics, and fluid dynamics. However, the law of mass conservation for closed systems, as viewed from their center of momentum inertial frames, continues to hold in modern physics. Mass is also not generally conserved in open systems, when various forms of energy are allowed into, or out of, the system. The law of 'matter' conservation (in the sense of conservation of particles) may be considered as an approximate physical law that holds only in the classical sense before the advent of special relativity and quantum mechanics. This implies that for any chemical process in a closed system, the mass of the reactants must equal the mass of the products. An equivalent statement is that matter cannot be created/destroyed, although it may be rearranged. The law of conservation of mass/matter, also known as law of mass/matter conservation (or the Lomonosov- Lavoisier law), states that the mass of a closed system will remain constant, regardless of the processes acting inside the system.

What is the law of conservation of matter