Bennett A.

THALLIUM

1 . Name and Symbol of Element: Thallium, Tl

2. Atomic Number: 81

3. Mass Number: 204.3833 (204)

4. Melting Point: 303.5 C

5. Boiling Point: 1457 C

6. Normal Phase: Solid

7. Element Family: Boron-Aluminum

8. Name of Discoverer and date of discovery: Sir William Crookes, 1861


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