All the elements in the Periodic Table are made from different atoms, and the structure of these atoms results in a gamut of phenomena from radioactive decay to nuclear power.

Thomson's model of the atom included a large number of electrons suspended in something that produced a positive charge giving the atom an overall neutral charge.

American Chemical Society: Chemistry for Life.A hydrogen atom has one proton as the nucleus and one electron in the region outside the nucleus. The electron and proton are attracted to each other.

Atoms consist of a nucleus containing protons and neutrons, surrounded by electrons in shells. The numbers of particles in an atom can be calculated from its atomic number and mass number.

A trio of scientists won the Nobel Prize in physics for managing to do something that had always eluded humankind: Spotting electrons zipping around in an atom.