Periodic System for Chemists

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Table
11
22.99

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%

Related Elements

Category

Alkali Metals

Same Group

1 H Hydrogen3 Li Lithium19 K Potassium37 Rb Rubidium55 Cs Cesium87 Fr Francium

Same Period

12 Mg Magnesium13 Al Aluminum14 Si Silicon

Periodic Trends

Electronegativity →Atomic Radius →Density →Melting Point →

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