Monster name: Thallos
Thallium
- Atomic number
- 81
- Symbol
- Tl
- Series
- post-transition metals
- Group
- 13
- Period
- 6
- State of matter
- solid
- toxic
This highly toxic element got its name from the Greek word thallós, which translates into "green twig" because of its characteristic green spectral line. That means it turns flames into green when burning. Therefore it was used for green emergency flares. Other uses are in special optical glasses and in rat poison.
