Protonium (nonfiction)

Protonium (symbol: Pn), also known as antiprotonic hydrogen, is a type of exotic atom in which a proton (symbol: p) and an antiproton (symbol: p) orbit each other.

Since protonium is a bound state of a particle and its corresponding antiparticle, it is an example of a type of exotic atom called an onium.

Like all onia, protonium is a boson with all quantum numbers (baryon number, flavor quantum numbers, etc.) and electrical charge equal to 0.

• Antiparticle (nonfiction)
• Antiproton (nonfiction)
• Baryon number (nonfiction)
• Boson (nonfiction)
• Electric charge (nonfiction
• Exotic atom (nonfiction)
• Flavor (particle physics) (nonfiction)
• Onium (nonfiction)
• Orbit (nonfiction)
• Proton (nonfiction)

• Protonium @ Wikipedia