Hey kids! Today I'm going to introduce you to the world of atoms. Atoms are little things that you or anybody else have ever seen. Make up things like trees, cars, paper, even you. So let's shrink down to size and see what it's like. We're going to into the Helium atom today. An atom is made of little things called protons, nuetrons, and electrons. Protons have a positive charge, neutrons have no charge, and electrons have ....