Watch this video to learn about how nuclear reactors work, but again, don't worry about the details.
Nuclear Reactions (Fission and Fusion)
Watch this video to learn about the combining and dividing of atomic nuclei, but don't worry about the details.
Synthetic Elements
New elements can be formed by adding protons to the nucleus of atoms. Recently scientist synthesized elements 114-118 and named them. Check out the video below to learn more about our changing table.
Also, check out the Weird Stuff page to find some more information on the discovery and naming of these elements.
The number of protons and neutrons inside a nucleus tends to be near a one-to-one ratio of protons to neutrons. This ratio tends to produce the most stable form of isotopes for that element.