Curated OER
[Bohr Model of Unununium]
A look at the transition metal unununium, which was renamed roentgenium in 2004. Includes basic information, including symbol, number, mass, melting and boiling points, and numbers of protons, electron, and neutrons.
Curated OER
Science Kids: Science Images: Basic Atom Structure
This diagram shows a basic atom structure with an atom core, proton, neutron and electron.