what is atom ??????
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An atom is the smallest unit of ordinary matter that forms a chemical element. Every solid, liquid, gas, and plasma is composed of neutral or ionized atoms. Atoms are extremely small, typically around 100 picometers across.
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An atom is the smallest unit of ordinary matter that forms a chemical element. Every solid, liquid, gas, and plasma is composed of neutral or ionized atoms. Atoms are extremely small, typically around 100 picometers across.
Components: Electrons and a compact nucleus of protons and neutrons.
Electric charge: zero (neutral), or ion charge.
Mass range: 1.67×10−27 to 4.52×10−25 kg.
Diameter range: 62 pm (He) to 520 pm (Cs) (data page).
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