Atoms

Atoms are the tiny building blocks that make up everything in the Universe,including ourselves.They are far too small to be seen ,even with the most powerful microscopes,Billions of them could fit on to the dot of this "i".Yet toms are themselves made up of even tinier substance particles called protons,neutrons,and electrons.

Inside an atoms

Atoms consist of three type of particle.At the center is a nucleus made up of protons,which have a positive electric charge.and neutrons ,which have no charge.This is orbited by some even smaller negatively charged particles called electrons which spin around the nucleus at great speeds.These particles are so tiny most of an atoms is actually just empty space.

Different atoms 

A helium atoms has just 2 protons ,2 neutrons and 2 electrons while a magnesium atoms has 12 of each.Sometimes atoms can lose or gain electrons to become a special type of atoms called anion.When an atoms loses electrons,it becomes a positively charged ion.If it gains electrons,it becomes a negatively charged ion.

Helium nucleus

Magnesium necleus