5
B
Boron
Boron
Boron (B)
Metalloids · Solid · Period 2 · Group 13
Element Properties
- Atomic Number
- 5
- Symbol
- B
- Atomic Mass
- 10.81
- Category
- Metalloids
- Standard State
- Solid
- Period
- 2
- Group
- 13
- Electronegativity
- 2.04
- Atomic Radius
- 192
- Ionization Energy
- 8.3
- Electron Affinity
- 0.28
- Oxidation States
- +3
- Melting Point
- 2348 K (2074.85 °C)
- Boiling Point
- 4273 K (3999.85 °C)
- Density
- 2.37
- Electron Configuration
- [He]2s2 2p1
- Year Discovered
- 1808
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Frequently asked questions
What is the atomic number of Boron?
The atomic number of Boron is 5, which equals the number of protons in its nucleus.
What is the atomic mass of Boron?
The atomic mass of Boron is approximately 10.81 u (one twelfth of the mass of a carbon-12 atom).
What is the electron configuration of Boron?
The electron configuration of Boron is [He]2s2 2p1.
Where is Boron in the periodic table?
Boron is located in period 2, group 13.
When was Boron discovered?
Boron was discovered in 1808.
Related elements
Same group
13
Al
Aluminum
26.982
31
Ga
Gallium
69.723
49
In
Indium
114.818
81
Tl
Thallium
204.383
113
Nh
Nihonium
286.182