Do you know atoms ??

An atom is the smallest constituent unit of ordinary matter that has the properties of a chemical element. Every solid, liquid, gas, and plasma is made up of neutral or ionized atoms. Electric charge‎: ‎zero (neutral), or ion charge‎ Components‎: ‎Electrons and a compact nucleus of protons and neutrons‎ Mass range‎: ‎1.67×10−27 to 4.52×10−25 kg‎ Diameter range‎: ‎62 pm (He) to 520 pm (Cs) (data page)‎