what do you understand by an atom
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an atom is the smallest and indivisible partical of a mixture element and compound
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atom is a smallest unit of matter that has proper of element.it is composed of dense core called nucleus and a series of outer shells occupied by orbiting electons.the nucleus composed of protons and nutrons. hope it help you
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Atoms are composed of particles called protons, electrons and neutrons. Protons carry a positive electrical charge, electrons carry a negative electrical charge and neutrons carry no electrical charge at all.