In tech we learned about atoms. They are so small. If you had a ball of nitrogen atoms the size of a grapefruit. You would have to make it the size of earth for the atoms to be the size of a blueberry. In the middle of the atom there is a nucleus. I the nucleus there are positively charged protons and neutrons that have no charge. Protons don’t like other protons like when two girls were the same dress. The neutrons are there so the nucleus can stay together. On the outside there are electrons. They are negatively charged. They are more in a cloud but we draw them differently.