![]() ![]() The atoms of fire were thorny which is why it caused painful burns. The atoms of earth were rough and jagged, so they held together to form hard substances. The atoms of water were smooth and round and unable to ‘hook’ on to each other, which is why liquid /water flows easily. ![]() According to him, atoms differ from each other physically, in shape, size and other properties and this resulted in the different properties of the substances formed by their combination. The word ‘atom’ means ‘indivisible’ in Greek. In ancient Greece, Democritus (Fourth century B.C.) is best known for his atomic hypothesis. In Lalitavistara, a famous biography of the Buddha written mainly in the second century B.C., the estimate is close to the modern estimate of atomic size, of the order of 10–10 m. The size of the atoms was also estimated, by conjecture or by methods that are not known to us. two atoms combine to form a diatomic molecule dvyanuka, three atoms form a tryanuka or a triatomic molecule), their properties depending upon the nature and ratio of the constituent atoms. Atoms combine to form different molecules (e.g. Akasa (space) was thought to have no atomic structure and was continuous and inert. The four kinds of atoms (Paramanu - Sanskrit word for the smallest particl e) postulated were Bhoomi (Earth), Ap (water), Tejas (fire) and Vayu (air) that have characteristic mass and other attributes, we re propounded. It was argued that if matter could be subdivided without an end, there would be no difference between a mustard seed and the Meru mountain. Atoms were thought to be eternal, indivisible, infinitesimal and ultimate parts of matter. ![]() In the Vaisheshika school of thought in India founded by Kanada (Sixth century B.C.) the atomic picture was developed in considerable detail. Attempt All sub parts from each question.Atomic Hypothesis in Ancient India and Greece Though John Dalton is credited with the introduction of atomic view point in modern science, scholars in ancient India and Greece conjectured long before the existence of atoms and molecules. ![]()
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