Pnictogen
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A pnictogen is any of the chemical elements in group 15 of the periodic table. Group 15 is also known as the nitrogen group or nitrogen family. Group 15 consists of the elements nitrogen, phosphorus,
A collection of pnictogen samples
Fluessiger Stickstoff
Phosph Comby
Arsen 1a
Chalcogen
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The chalcogens are the chemical elements in group 16 of the periodic table. This group is also known as the oxygen family. Group 16 consists of the elements oxygen, sulfur, selenium, tellurium, and th
The four stable chalcogens at STP
Water (H2O) is the most familiar chalcogen-containing compound.
Johann Wolfgang Döbereiner was among the first to notice similarities between what are now known as chalcogens.
Sulfur recovered from oil refining in Alberta, stockpiled for shipment in North Vancouver, British Columbia