Periodic Table Elements 81-90
Terms
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- Thallium
- Tl
- Lead
- Pb
- Bismuth
- Bi
- Polonium
- Po
- Astatine
- At
- Radon
- Rn
- Francium
- Fr
- Radium
- Ra
- Actinium
- Ac
- Thorium
- Th