GENERAL KNOWLEDGE

Detailed explanation-1: -In 1808, Dalton developed his masterpiece: “The New System of Chemical Philosophy". He suggested that all elements are composed of tiny, indestructible particles, he called atoms. Dalton proposed that the atoms of any particular element were all alike and had the same weight.

Detailed explanation-2: -All matter is composed of extremely small particles called atoms. Atoms of a given element are identical in size, mass, and other properties. Atoms of different elements differ in size, mass, and other properties. Atoms cannot be subdivided, created, or destroyed.

Detailed explanation-3: -Atoms are not indestructable, they can be destroyed through nuclear reactions or by physical means. Atoms are however CHEMICALLY indestructable. They are made up of protons and neutrons and electrons and cannot be destroyed by a chemical reaction-they simply are rearranged.

Detailed explanation-4: -Dalton’s theory was based on the concept that each element consists of its own unique brand of indivisible atom; atoms of one element are all alike but they differ from atoms of other elements. Importantly, Dalton assigned atomic weights to the atoms of the 20 elements he knew of at the time.