Top Definition
Name: Thallium
Symbol: Tl
Atomic number: 81
Atomic weight: 204.3833 (2)
CAS Registry ID: 7440-28-0
Group number: 13
Group name: (none)
Period number: 6
Block: p-block
I ate the thallium and got cancer.
by MavisBeacon August 22, 2003
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