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Table

1.01

H

Hydrogen

Identification

CAS Number: 1333-74-0

Discovery Year: 1766

Discoverer: Henry Cavendish

Discovery Location: England

Properties

Atomic Mass: 1.008 →Density: 0.000082 g/cm³ →

Crust Abundance: 1400 mg/kg

Crystal Structure: HEX

Atomic Dimensions

Atomic Radius: 25 pm →

Atomic Radius (Rahm): 154 pm

Covalent Radius: 31 pm →

Van der Waals Radius: 110.00000000000001 pm

Atomic Volume: 14.1 cm³/mol

Lattice Constant: 3.75 Å

Thermodynamics

Melting Point: 14.01 K →Boiling Point: 20.28 K →Thermal Conductivity: 0.1815 W/(m·K) →Heat of Fusion: 0.117 kJ/mol →Heat of Vaporization: 0.904 kJ/mol →

Heat of Formation: 217.998 kJ/mol

Electronic Structure

Electron Config: 1s

Block: s

Period: 1 →Group: 1 →Electronegativity: 2.2 →Electron Affinity: 0.754195 eV →

Oxidation States: -1, +1

Abundance & Geochemistry

Crust Abundance: 1400 mg/kg

Sea Abundance: 108000 mg/L

Geochemical Class: volatile

Goldschmidt Class: atmophile

About

Hydrogen is the lightest and most abundant element in the universe. It is a colorless, odorless gas that combines with oxygen to form water.

Isotopes

H-1 1 99.97%

H-2 2 0.0280%

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H

Hydrogen

Identification

Properties

Atomic Dimensions

Thermodynamics

Electronic Structure

Abundance & Geochemistry

About

Isotopes

Related Elements

Category

Same Group

Same Period

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