Na

Sodium

Atomic Number 11 · Metal chunk in mineral oil

A highly reactive alkali metal. As sodium chloride (table salt), it is essential for animal life.

Atomic Mass

22.99 u

Category

Alkali Metal

Phase (STP)

Solid

Density

0.971 g/cm³

Melting Point

97.794 °C

Boiling Point

882.94 °C

Electronegativity

0.93 (Pauling)

Atomic Radius

180 pm

Electron Configuration

[Ne] 3s1

Discovered

1807 — Humphry Davy

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Sample form: Metal chunk in mineral oil

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