Think of the smallest object you have seen. A sand particle, a mustard seed, some dust particle, or anything else that is very small. What happens if you use a microscope and a very tiny knife and cut it into two halves? You will get a smaller sand particle, a smaller mustard seed, etc. What if you cut the smaller particle again? You will get an even smaller particle. 

This video can be used to introduce your students to the atom and the proton, neutron and electron.

This video looks at how elements relate to atoms giving the basics of protons, electrons and neutrons that make up an atom.

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