Barium
56
Ba
Groep
2
Periode
6
Blok
s
Protrone
Elektrone
Neutrone
56
56
81
Algemene Eienskappe
Atoom Nommer
56
Atoommassa
137,327
Massa Nommer
137
Kategorie
Aardalkalimetale
Kleur
Silver
Radioaktief
Nee
From the Greek word barys, heavy
Kristalstruktuur
Ligaamsgesentreerde kubieke
Geskiendenis
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.
Elektrone per skil
2, 8, 18, 18, 8, 2
Elektronkonfigurasie
[Xe] 6s2
At low doses, barium acts as a muscle stimulant
Fisiese Eienskappe
Fase
Soliede
Digtheid
3,594 g/cm3
Smeltpunt
1000,15 K | 727 °C | 1340,6 °F
Kookpunt
2170,15 K | 1897 °C | 3446,6 °F
Heat of Fusion
8 kJ/mol
Heat of Vaporization
140 kJ/mol
Spesifieke Hitte Kapasiteit
0,204 J/g·K
Oorvloed in die aardkors
0,034%
Oorvloed in die heelal
1×10-6%
CAS Nommer
7440-39-3
PubChem CID Nommer
5355457
Atomiese Eienskappe
Atoom radius
222 pm
Kovalente Radius
215 pm
Elektronegatiewiteit
0,89 (Pauling scale)
Ionisasie potensiaal
5,2117 eV
Atoom volume
39,24 cm3/mol
Termiese geleidingsvermoë
0,184 W/cm·K
Oksidasiestate
2
Toepassings
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
Isotope
Stabiele Isotope
130Ba, 132Ba, 134Ba, 135Ba, 136Ba, 137Ba, 138BaOnstabiele Isotope
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