Tl	Z =  81	◊ ◊ ◊ ◊ ◊	Thallium
			From the Greek "thallos", meaning "green twig"
(AM) Atomic Mass	204.38  amu	♦	Oxidation States	+1, +3
(BP) Boiling Point	1473  °C	♦	(MP) Melting Point	304  °C
(ρ) Density	11.85  g/cm3	♦	Crystal Structure	Hexagonal
( χ ) Electronegativity	1.62	♦	(AR) Atomic Radius	1.48  Å
Physical State	Solid	♦	(C) Heat Capacity	0.129  J/g °C
Electronic-Config	[Xe]  4f14  5d10  6s2  6p1	♦	(I1) First Ionization E	589.33  kJ/mol
(ΔHvap) Heat of Vaporization	165  kJ/mol	♦	(ΔHfus) Heat of Fusion	4.14  kJ/mol
Year of Discovery	1861	♦	Location of Discovery	England
(E°) Standard Potential	Tl+⇔ Tl (-0.340 V),   Tl3+⇔ Tl (0.720 V)
Stable isotopes	203Tl,  205Tl
Discovered/Synthesized by	Sir William Crookes
Natural Source	Isolated by the recoverey from processing copper, lead and zinc ores
Common Uses	Low-mp mercury alloys, low-temperature thermometers, undersea lamps, photocells
Other Info	Most toxic of all the elements
Previous Element				Next Element
Back to Table				Common Properties
Home Page				Definitions