Na

Sodium

Identification

CAS Number: 7440-23-5

Discovery Year: 1807

Discoverer: Sir Humphrey Davy

Discovery Location: England

Properties

Atomic Mass: 22.98976928 →Density: 0.97 g/cm³ →

Crust Abundance: 23600 mg/kg

Crystal Structure: BCC

Atomic Dimensions

Atomic Radius: 180 pm →

Atomic Radius (Rahm): 225 pm

Covalent Radius: 166 pm →

Van der Waals Radius: 227 pm

Metallic Radius: 157 pm

Atomic Volume: 23.7 cm³/mol

Lattice Constant: 4.23 Å

Thermodynamics

Melting Point: 370.96 K →Boiling Point: 1156.1 K →Specific Heat: 1.222 J/(g·K) →Thermal Conductivity: 142 W/(m·K) →Heat of Fusion: 2.64 kJ/mol →Heat of Vaporization: 97.9 kJ/mol →

Heat of Formation: 107.5 kJ/mol

Electronic Structure

Electron Config: [Ne] 3s

Block: s

Period: 3 →Group: 1 →Electronegativity: 0.93 →Electron Affinity: 0.547926 eV →

Oxidation States: +1

Abundance & Geochemistry

Crust Abundance: 23600 mg/kg

Sea Abundance: 10800 mg/L

Geochemical Class: major

Goldschmidt Class: litophile

About

Sodium is a soft, silvery-white metal that reacts violently with water. It is essential for life and is commonly found in table salt (sodium chloride).

Isotopes

Na-23 23 100.00%