Bario
56
Ba
Grupo
2
Perio
6
Bloko
s
Protonoj
Elektronoj
Neŭtronoj
56
56
81
Ĝeneralaj Propraĵoj
Atoma Nombro
56
Atommaso
137,327
Amasa Nombro
137
Kategorio
Teralkalaj metaloj
Koloro
Arĝento
Radioaktiva
Ne
From the Greek word barys, heavy
Kristala Strukturo
Korpo Centrita Kubo
Historio
Barium was identified as a new element in 1774 by Carl Wilhelm Scheele.
Barium was first isolated by electrolysis of molten barium salts in 1808, by Sir Humphry Davy in England.
Robert Bunsen and Augustus Matthiessen obtained pure barium by electrolysis of a molten mixture of barium chloride and ammonium chloride.
Barium was first isolated by electrolysis of molten barium salts in 1808, by Sir Humphry Davy in England.
Robert Bunsen and Augustus Matthiessen obtained pure barium by electrolysis of a molten mixture of barium chloride and ammonium chloride.
Elektronoj per ŝelo
2, 8, 18, 18, 8, 2
Elektrona Agordo
[Xe] 6s2
At low doses, barium acts as a muscle stimulant
Fizikaj Propraĵoj
Fazo
Solido
Denso
3,594 g/cm3
Fandpunkto
1000,15 K | 727 °C | 1340,6 °F
Bolpunkto
2170,15 K | 1897 °C | 3446,6 °F
Varmo de Fuzio
8 kJ/mol
Varmo de Vaporiĝo
140 kJ/mol
Specifa Varmo Kapacito
0,204 J/g·K
Krusta Abundo
0,034%
Universa Abundo
1×10-6%
CAS Nombro
7440-39-3
PubChem Kunmetita Identiga Nombro
5355457
Atomaj Propraĵoj
Atoma Radiuso
222 pm
Kovalenta Radiuso
215 pm
Elektronegativeco
0,89 (Pauling-skalo)
Potencialo de jonigo
5,2117 eV
Atoma Volumo
39,24 cm3/mol
Termika Kondukto
0,184 W/cm·K
Oksidaj Ŝtatoj
2
Aplikoj
Barium is used as a flashed getter in vacuum tubes to remove the last traces of gases.
It is often used in barium-nickel alloys for spark plug wire.
Barium sulfate is important to the petroleum industry as a drilling fluid in oil and gas wells.
Barium is also used in medicine to detect abnormalities in the digestive system.
It is often used in barium-nickel alloys for spark plug wire.
Barium sulfate is important to the petroleum industry as a drilling fluid in oil and gas wells.
Barium is also used in medicine to detect abnormalities in the digestive system.
Water-soluble barium compounds are poisonous
Izotopoj
Stabilaj Izotopoj
130Ba, 132Ba, 134Ba, 135Ba, 136Ba, 137Ba, 138BaMalstabilaj Isotopoj
114Ba, 115Ba, 116Ba, 117Ba, 118Ba, 119Ba, 120Ba, 121Ba, 122Ba, 123Ba, 124Ba, 125Ba, 126Ba, 127Ba, 128Ba, 129Ba, 131Ba, 133Ba, 139Ba, 140Ba, 141Ba, 142Ba, 143Ba, 144Ba, 145Ba, 146Ba, 147Ba, 148Ba, 149Ba, 150Ba, 151Ba, 152Ba, 153Ba