56
Ba
Barium
Barium
Barium (Ba)
Alkaline Earth Metals · Solid · Period 6 · Group 2
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Element Properties
- Atomic Number
- 56
- Symbol
- Ba
- Atomic Mass
- 137.33
- Category
- Alkaline Earth Metals
- Standard State
- Solid
- Period
- 6
- Group
- 2
- Electronegativity
- 0.89
- Atomic Radius
- 268
- Ionization Energy
- 5.21
- Electron Affinity
- —
- Oxidation States
- +2
- Melting Point
- 1000 K (726.85 °C)
- Boiling Point
- 2170 K (1896.85 °C)
- Density
- 3.62
- Electron Configuration
- [Xe]6s2
- Year Discovered
- 1808
Frequently asked questions
What is the atomic number of Barium?
The atomic number of Barium is 56, which equals the number of protons in its nucleus.
What is the atomic mass of Barium?
The atomic mass of Barium is approximately 137.33 u (one twelfth of the mass of a carbon-12 atom).
What is the electron configuration of Barium?
The electron configuration of Barium is [Xe]6s2.
Where is Barium in the periodic table?
Barium is located in period 6, group 2.
When was Barium discovered?
Barium was discovered in 1808.
Related elements
Same group
4
Be
Beryllium
9.012
12
Mg
Magnesium
24.305
20
Ca
Calcium
40.08
38
Sr
Strontium
87.62
88
Ra
Radium
226.025