Barium (Ba) Properties |
ABarium (ABa)
Properties 1/ |
Nuclear (56 protons/electrons)
- Atomic Number: 56
- Atomic Mass: 137.327
- Atomic Energy: 0.205 Ergs
- Group: 2 ; Period: 6
- Family: Alkaline
Earth Metals
- Bonding Radius: 1.98 Angstroms
- Atomic Radius: 2.78 Angstroms
- Atomic Volume: 39.24 cm3mol-1
- 40
Isotopes: 114Ba
to 153Ba
- Stable Isotopes: 130Ba ,
132Ba, 133Ba,
134Ba, 135Ba,
137Ba, 138Ba
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Nuclear (56 Aprotons/positrons)
- Atomic Number: 56
- Atomic Mass: 137.327
- Atomic Energy: 0.205 Ergs
- Group: 2 ; Period: 6
- Family: Alkaline
Earth Metals
- Bonding Radius: 1.98 Angstroms
- Atomic Radius: 2.78 Angstroms
- Atomic Volume: 39.24 cm3mol-1
- 40 AIsotopes: 114ABa
to 153ABa
- Stable AIsotopes: 130ABa,
132ABa, 133ABa,
134ABa, 135ABa,
137ABa, 138ABa
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Physical
- Soft heavy silver colored metal
- Density:3.51g cm-3
- Melting Point: 725 oC
- Boiling Point: 1140 oC
- Specific Heat: 0.204 J g-1 K-1
- Heat of Vaporization: 142.0 kJ mol-1
- Heat of Fusion: 7.75 kJ mol-1
- Electrical Conductivity: 0.030 106 cm-1 Ohm-1
- Thermal Conductivity: 0.184 W cm-1 K-1
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Physical
- Soft heavy silver colored metal
- Density:3.5 g/cm-3
- Melting Point: 725 oC
- Boiling Point: 1140 oC
- Specific Heat: 0.204 J g-1 K-1
- Heat of Vaporization: 142.0 kJ mol-1
- Heat of Fusion: 7.75 kJ mol-1
- Electrical Conductivity: 0.030 106 cm-1 Ohm-1
- Thermal Conductivity: 0.184 W cm-1 K-1
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Chemical
- Valance Number: +2
- Electron Configuration: 2,8,18,18,8,2
- Electronegativity: 0.89
- 1st Ionization Potential: 5.21 Volts
- 2nd Ionization Potential: 10.0 Volts
- 3rd Ionization Potential: ? Volts
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Chemical
- Valance Number: -2
- Positron Configuration: 2,8,18,18,8,2
- Positronpositivity: 0.89
- 1st Ionization Potential: 5.21 Volts
- 2nd Ionization Potential: 10.0 Volts
- 3rd Ionization Potential: ? Volts
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Identified by Sir Humphrey Davy
from England in 1808
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Identified by Norm Hansen in 2001
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