Naturally occurring chlorine is composed of two stable isotopes namely Cl 35 (75.76 %) and Cl 37 (24.24%) with atomic masses of 34.9689 u (atomic mass unit) and 36.9659 u. Calculate the atomic weight of chlorine.

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Atoms and Molecules

An atom is the smallest unit of an element that possesses all the properties of that particular element. Molecules are the smallest unit of a substance that possess all the properties of that particular substance.