5 B Boron 10.81 u

Boron

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Period
2
Group
13
Block
p-block
Phase (STP)
Solid

Boron is a metalloid essential for plant growth and used in glass and ceramics. Its compounds, such as borax, have been used for thousands of years.

Appearance: Black-brown

Physical Properties

Atomic Mass 10.81 u
Density 2.34 g/cm³
Melting Point 2075.8 °C
Boiling Point 3926.8 °C
Phase at STP Solid
Atomic Radius 87.0 pm

Electronic Properties

Electronegativity 2.04
Ionization Energy 800.6 eV
Electron Affinity 26.7 eV
Valence Electrons 3

Electron Configuration

Configuration [He] 2s² 2p¹

Electron Shell Configuration

Boron electron shell configuration B 2e⁻ 3e⁻

Position in Periodic Table

Boron position in the periodic table B

Discovery

Discovered by: Joseph Louis Gay-Lussac
Year: 1808

Compounds Containing Boron

More Metalloid

Frequently Asked Questions

What is Boron?
Boron (B) is a chemical element with atomic number 5. It is a solid at standard temperature and pressure, classified as a metalloid.
What are the key properties of Boron?
Boron has an atomic mass of 10.81 u, density of 2.34 g/cm³, melting point of 2075.8°C, boiling point of 3926.8°C.
What is the electron configuration of Boron?
The electron configuration of Boron is [He] 2s2 2p1. It is in the p-block of the periodic table.
Who discovered Boron?
Boron was discovered by Joseph Louis Gay-Lussac in 1808.
What is the electronegativity of Boron?
Boron has an electronegativity of 2.04 on the Pauling scale.