So, it can be said that the Atomic theory has crossed the thousands of years, when it begins in the 5th century B.C., with Democritus theory “ matter consists of the indivisible, indestructible units that interact with each other“. Though Atomic theory is the concept that originated in ancient India and Greece. The word ‘atoms’ is derived from the Greek word ‘ atomos‘, meaning ‘ indivisible‘. The Atomic theory is the scientific explanation of the properties of atoms and matter that combines factors of physics, chemistry, and mathematics. We all are aware of the modern theory which says that “matter is made up of tiny particles known as atoms which in turn are made up of subatomic particles”. Ernest Rutherford said that an atom consists of the whole mass that is concentrated into the center.įrom the above statement, we can say that both the models of the atom differ in the way they explained the movements of electrons around the nucleus and their energy levels.
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