11 Na Sodium 22.99 u

Sodium

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Period
3
Group
1
Block
s-block
Phase (STP)
Solid

Sodium is a highly reactive alkali metal essential for biological function. Its compound sodium chloride (table salt) is vital for life.

Appearance: Silvery-white metallic

Physical Properties

Atomic Mass 22.99 u
Density 0.971 g/cm³
Melting Point 97.8 °C
Boiling Point 882.9 °C
Phase at STP Solid
Atomic Radius 190.0 pm

Electronic Properties

Electronegativity 0.93
Ionization Energy 495.8 eV
Electron Affinity 52.8 eV
Valence Electrons 1

Electron Configuration

Configuration [Ne] 3s¹

Electron Shell Configuration

Sodium electron shell configuration Na 2e⁻ 8e⁻ 1e⁻

Position in Periodic Table

Sodium position in the periodic table Na

Discovery

Discovered by: Humphry Davy
Year: 1807

Compounds Containing Sodium

More Alkali Metal

Frequently Asked Questions

What is Sodium?
Sodium (Na) is a chemical element with atomic number 11. It is a solid at standard temperature and pressure, classified as a alkali metal.
What are the key properties of Sodium?
Sodium has an atomic mass of 22.99 u, density of 0.971 g/cm³, melting point of 97.8°C, boiling point of 882.9°C.
What is the electron configuration of Sodium?
The electron configuration of Sodium is [Ne] 3s1. It is in the s-block of the periodic table.
Who discovered Sodium?
Sodium was discovered by Humphry Davy in 1807.
What is the electronegativity of Sodium?
Sodium has an electronegativity of 0.93 on the Pauling scale.