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Ted: Ted Ed: Thallium: Periodic Table of Videos Unit Plan
TED Talks

Ted: Ted Ed: Thallium: Periodic Table of Videos

For Students 9th - 10th
The team at Periodicvideos has created a TED-Ed Lesson for every element of the periodic table. Poisonous thallium is element number 81 and its chemical symbol is Tl. [1:11]
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