| Visual_Elements__Potassium Image, animation, source, uses, physical information, and key isotopes. |
| WebElements__Potassium Extensive information on history, uses, occurrence, compounds, and properties of the element. |
| Wikipedia__Potassium Properties of the element, including its history, applications, and characteristics. |
| Radiochemistry_of_Potassium Full text of the monograph by William T. Mullins and G. W. Leddicotte (Oak Ridge National Laboratory, Oak Ridge, Tennessee). [PDF] (November, 1961) |
| ChemicalElements_com__Tellurium Basic information, atomic structure, and table of isotopes. |
| EnvironmentalChemistry_com__Tellurium Atomic structure, chemical and physical properties, and table of nuclides. |
| It\'s_Elemental__Tellurium Basic physical and historical information. |
| LANL__Tellurium Sources, properties, handling, and uses. |
| Lenntech__Tellurium Physical data, chemical properties, health and environmental effects. |
| Tellurium Data tables and historic information. |
| Visual_Elements__Tellurium General and physical information, source, uses, key isotopes, and ionisation energies. |
| WebElements__Tellurium Extensive information on history, uses, occurrence, compounds, and properties. |
| Wikipedia__Tellurium Properties of the element, including its history, applications, and characteristics. |
| Radiochemistry_of_Tellurium Full text of the monograph by G. W. Leddicotte (Oak Ridge National Laboratory, Oak Ridge, Tennessee). [PDF] (July, 1961) |
| ChemicalElements_com__Cobalt Basic information, atomic structure, and isotopes. |
| Cobalt Data tables and historic information. |
| EnvironmentalChemistry_com__Cobalt Atomic structure, chemical and physical properties, and table of nuclides. |
| It\'s_Elemental__Cobalt Basic physical and historical information. |
| LANL__Cobalt History, sources, properties, and uses. |
| Lenntech__Cobalt Physical data, chemical properties, health and environmental effects. |
| USGS_Minerals_Information__Cobalt Statistics and information on the worldwide supply, demand, and flow of the element (PDF format). |
| Visual_Elements__Cobalt Image, general and physical information, source, uses, biological role, key isotopes, and ionisation energies. |
| WebElements__Cobalt Extensive information on history, uses, occurrence, compounds, and properties of the element. |
| Wikipedia__Cobalt Properties of the element, including its history, applications, and characteristics. |
| Radiochemistry_of_Cobalt Full text of the monograph by L.C. Bate (Oak Ridge National Laboratory, Oak Ridge, Tennessee). [PDF] (September, 1961) |
| ChemicalElements_com__Nickel Basic information, atomic structure, and isotopes. |
| EnvironmentalChemistry_com__Nickel Atomic structure, chemical and physical properties, and table of nuclides. |
| It\'s_Elemental__Nickel Basic physical and historical information. |
| LANL__Nickel Sources, properties, and uses. |
| Lenntech__Nickel Physical data, chemical properties, health and environmental effects. |
| Nickel Data tables and historic information. |
| USGS_Minerals_Information__Nickel Statistics and information on the worldwide supply, demand, and flow of the element (PDF format). |
| Visual_Elements__Nickel Image, general and physical information, source, uses, key isotopes, and ionisation energies. |
| WebElements__Nickel Extensive information on history, uses, occurrence, compounds, and properties of the element. |
| Wikipedia__Nickel Properties of the element, including its history, applications, and characteristics. |
| Radiochemistry_of_Nickel Full text of the monograph by L. J. Kirby (Hanford Atomic Products Operation, Richland, Washington). [PDF] (November, 1961) |
| ChemicalElements_com__Platinum Basic information, atomic structure, and isotopes. |
| EnvironmentalChemistry_com__Platinum Atomic structure, chemical and physical properties, and table of nuclides. |
| It\'s_Elemental__Platinum Basic physical and historical information. |
| LANL__Platinum Sources, properties, and uses. |
