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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➝Atoms are the basic building blocks of ordinary matter. Atoms are composed of particles called protons, electrons and neutrons.
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➝ Examples of Atom :
- Neon ( Ne)
- Hydrogen ( H )
- Iron ( Fe)
- Calcium ( Ca )
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