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Elements

• 161
• USGS Minerals Information: Germanium
• Statistics and information on the worldwide supply, demand, and flow of the element (PDF format).

• 162
• Wikipedia: Germanium
• Properties of the element, including its history, applications, and characteristics.

• 163
• ChemicalElements.com: Gold
• Basic information, atomic structure, and table of isotopes.

• 164
• It's Elemental: Gold
• Basic physical and historical information.

• 165
• USGS Minerals Information: Gold
• Statistics and information on the worldwide supply, demand, and flow of the element (PDF format).

• 166
• Wikipedia: Gold
• Properties of the element, including its history, applications, and characteristics.

• 167
• ChemicalElements.com: Hafnium
• Basic information, atomic structure, and isotopes.

• 168
• It's Elemental: Hafnium
• Basic physical and historical information.

• 169
• Wikipedia: Hafnium
• Properties of the element, including its history, applications, and characteristics.

• 170
• ChemicalElements.com: Hassium
• Basic information, diagram of atomic structure, and facts.

• 171
• It's Elemental: Hassium
• Basic physical and historical information.

• 172
• Wikipedia: Hassium
• Basic physical and historical information.

• 173
• ChemicalElements.com: Helium
• Basic information, atomic structure, and table of isotopes.

• 174
• Especiál Gas Inc.: Helium
• Numeric data, uses, and general information.

• 175
• It's Elemental: Helium
• Basic physical and historical information.

• 176
• USGS Minerals Information: Helium
• Statistics and information on the worldwide supply, demand, and flow of the element (PDF format).

• 177
• WebElements: Helium
• Extensive information on history, uses, occurrence, and properties of the element.

• 178
• Wikipedia: Helium
• Properties of the element, including its history, applications, and characteristics.

• 179
• ChemicalElements.com: Holmium
• Basic information, atomic structure, and isotopes table.

• 180
• It's Elemental: Holmium
• Basic physical and historical information.