Electronic data		Thermal data		Steric data
Shells: 2,8,18,18,5 Orbitals: [Kr] 4d10 5s2 5p3 Electronegativity: 1.8, 1.9 1. Ionization potential: 8.64 eV 2. Ionization potential: 16.53 eV 3. Ionization potential: 25.30 eV Oxidation states: 5,3,-3 Electrical conductivity: 0.0288 10^6		Melting point: 630.74 °C Boiling point: 1587 °C Specific heat: 0.21 J/gK Heat of fusion: 19.870 kJ/mol Heat of vaporization: 77.140 kJ/mol Thermal conductivity: 0.243 W/cmK		Atomic radius: 1.53 Å Ionic radius: 0.76 Å () Covalent radius: 1.40 Å Atomic volume: 18.23 cm³/mol Density (293 K): 6.684 g/cm³ Crystal structure: Rhombohedral

Nuclide	Abundance [%]	Mass	Spin	Halflife	Decay mode	Decay tree
117Sb	0	117	5/2	2.80h	EC,+	View
119Sb	0	119	5/2	38.1h	EC	View
120Sb	0	120	1	15.89m	EC,+	View
121Sb	57.25	120.904	5/2	--	stable	--
122Sb	0	122	2	2.70d	-,+,EC	View
123Sb	42.75	122.904	7/2	--	stable	--
124Sb	0	124	3	60.20d	-	View
125Sb	0	125	7/2	2.758y	-,b-	View
126Sb	0	126	8	12.4d	-	View
126Sbm	0	126	5	19.0m	-,IT	View
127Sb	0	127	7/2	3.84d	-,b-	View
129Sb	0	129	7/2	4.40h	-,b-	View

Legend

Name origin:	Greek: anti and monos (not alone); symbol from mineral stibnite.
Description:	Hard, brittle, silvery-white semimetal.
Discovered by:	Known to the ancients
Year:	--
Place:	Unknown
Sources:	Found in stibnite (Sb2S3) and in valentinite (Sb2O3).
Use(s):	It is alloyed with other metals to increase their hardness. Also in the manufacture of a few special types of semiconductor devices. Also in plastics and chemicals. A few kinds of over-the-counter cold and flu remedies use antimony compounds.