ATOMIC THEORY AND SUBATOMIC PARTICLES

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He proposed that matter is composed of tiny, indivisible particles they called atomos which means “uncutable” in Greek.

DEMOCRITUS

He proposed that matter is composed of vey small, spherical, indivisible particles called atoms.

John Dalton’s Atomic Theory

He said that atoms are chemically combine in simple, fixed, whole-number ratios to form compounds.

Dalton’s Model

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