Barium (Ba) — Alkaline earth metal. Atomic number 56.
Soft silvery alkaline earth metal
- Atomic number: 56
- Symbol: Ba
- Atomic mass: 137.33 u
- Category: Alkaline earth metal
- State: Solid
- Melting point: 726.85 °C / 1000 K
- Boiling point: 1896.85 °C / 2170 K
- Density: 3.62 g/cm³ (20°C)
- Electron configuration: [Xe] 6s2
- Oxidation states: +2
- Electronegativity: 0.89
- Discovered by: Humphry Davy (1808)
Common uses: Medical imaging, Glass, Ceramics, Drilling fluids
Biological role: No known essential biological role.
Frequently Asked Questions about Barium
What is the atomic number of barium?
Barium has an atomic number of 56, meaning each atom contains 56 protons in its nucleus.
What is the atomic mass of barium?
The standard atomic weight of barium is 137.33 u (unified atomic mass units).
What category does barium belong to?
Barium is classified as a alkaline earth metal.
What is the state of barium at room temperature?
Barium is a solid at 20 °C (68 °F).
What is the melting point of barium?
The melting point of barium is 726.85 °C / 1000 K.
What is the boiling point of barium?
The boiling point of barium is 1896.85 °C / 2170 K.
What is the density of barium?
The density of barium is 3.62 g/cm³ (20°C).
What is the electronegativity of barium?
Barium has a Pauling electronegativity of 0.89.
What is the electron configuration of barium?
The electron configuration of barium is [Xe] 6s2.
What are the common oxidation states of barium?
Barium commonly exhibits the following oxidation states: +2.
When was barium discovered?
Barium was discovered in 1808 by Humphry Davy.
Is barium radioactive?
Barium is a stable element with no naturally occurring radioactive isotopes.
What is the biological role of barium?
No known essential biological role.
What are the common uses of barium?
Barium is used for: Medical imaging; Glass; Ceramics; Drilling fluids.
