1. Actinide Series Rare earth metals

2. Th Thorium Subcritical nuclear fuel Subcritical nuclear fuel Gas lantern mantles Gas lantern mantles

3. Pa Protactinium

4. U Uranium Found in ore Pitchblende Found in ore Pitchblende Ceramic glaze Ceramic glaze Nuclear fuel Nuclear fuel Nuclear weapons Nuclear weapons Depleted uranium for armor and armor piercing shells Depleted uranium for armor and armor piercing shells

5. Np Neptunium

6. Pu Plutonium A bomb core A bomb core Spacecraft propulsion Spacecraft propulsion Not particularly toxic unless ingested or inhaled Not particularly toxic unless ingested or inhaled

7. Am Americium Smoke detectors Smoke detectors

8. Cm Curium Named after Marie and Pierre Curie Named after Marie and Pierre Curie

9. Bk Berkelium Named after Berkeley, California Named after Berkeley, California

10. Cf Californium Named after California Named after California

11. Es Einsteinium Named after Norman Einstein Named after Norman Einstein

12. Fm Fermium Named after Enrico Fermi Named after Enrico Fermi

13. Md Mendelevium Named after Dmitri Mendeleev Named after Dmitri Mendeleev

14. No Nobelium Named after Alfred Nobel Named after Alfred Nobel

15. Lr Lawrencium Named after Ernest Orlando Lawrence, inventor of the cyclotron Named after Ernest Orlando Lawrence, inventor of the cyclotron