Chemistry Atomic Structure

 

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  All substances are made of tiny particles of matter called atoms which are the building blocks of all matter

• Each atom is made of subatomic particles called protons, neutrons, and electrons

• The protons and neutrons are located at the centre of the atom, which is called the nucleus

• The electrons move very fast around the nucleus in orbital paths called shells

• The mass of the electron is negligible, hence the mass of an atom is contained within the nucleus where the protons and neutrons are located