Periodic System for Chemists
Table
13
26.98

Al

Aluminum

Identification

CAS Number: 7429-90-5
Discovery Year: 1825
Discoverer: Hans Christian Oersted
Discovery Location: Denmark

Properties

Atomic Mass: 26.9815385 →Density: 2.7 g/cm³ →
Crust Abundance: 82300 mg/kg
Crystal Structure: FCC

Atomic Dimensions

Atomic Radius: 125 pm →
Atomic Radius (Rahm): 239 pm
Covalent Radius: 121 pm →
Van der Waals Radius: 184 pm
Metallic Radius: 125 pm
Atomic Volume: 10 cm³/mol
Lattice Constant: 4.05 Å

Thermodynamics

Melting Point: 933.5 K →Boiling Point: 2740 K →Specific Heat: 0.9 J/(g·K) →Thermal Conductivity: 237 W/(m·K) →Heat of Fusion: 10.75 kJ/mol →Heat of Vaporization: 284.1 kJ/mol →
Heat of Formation: 330.9 kJ/mol

Electronic Structure

Electron Config: [Ne] 3s2 3p
Block: p
Period: 3 →Group: 13 →Electronegativity: 1.61 →Electron Affinity: 0.43283 eV →
Oxidation States: +3

Abundance & Geochemistry

Crust Abundance: 82300 mg/kg
Sea Abundance: 0.002 mg/L
Geochemical Class: major
Goldschmidt Class: litophile

About

Aluminum is a lightweight, silvery-white metal with excellent corrosion resistance. It is widely used in construction, packaging, and transportation.

Isotopes

Al-27 27 100.00%