Tl - Thallium - periodic table of the elements

The toxic heavy metal thallium was discovered in 1861 in London.

Atomic number	-	81		Density	g/mL	11	.85
Atomic weight	u	204	.37	Melting point	K	577
Bonding radius	A	1	.48	Boiling point	K	1746
Atomic radius	A	2	.08	Heat of vaporization	kJ/mol	164	.1
Ionization Potential	V	6	.108	Heat of fusion	kJ/mol	4	.142
Electronegativity	-	2	.04	Specific heat	J/gK	0	.13
The oxide is mildly basic.				Crystal are hexagonal.
Electron configuration: [Xe] 4f¹⁴ 5d¹⁰ 6s² 6p¹

Other elements of the periodic table

1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18

H He

Li Be B C N O F Ne

Na Mg Al Si P S Cl Ar

K Ca Sc Ti V Cr Mn Fe Co Ni Cu Zn Ga Ge As Se Br Kr

Rb Sr Y Zr Nb Mo Tc Ru Rh Pd Ag Cd In Sn Sb Te I Xe

Cs Ba La * Hf Ta W Re Os Ir Pt Au Hg Tl Pb Bi Po At Rn

Fr Ra Ac ** Rf Db Sg Bh Hs Mt 110 111 112 113

Lanthanides* Ce Pr Nd Pm Sm Eu Gd Tb Dy Ho Er Tm Yb Lu

Actinides ** Th Pa U Np Pu Am Cm Bk Cf Es Fm Md No Lr