Definitionn. a toxic nonmetallic element related to sulfur and tellurium
Last update: September 28, 2015
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The Korn telephotographic apparatus is based on the principle of an apparatus devised by Shelford Bidwell in 1881 for the electrical transmission of pictures to a distance, in which use was made of the change in electrical resistance which selenium undergoes when acted upon by light. [Please select]
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From 400,000 pounds of silver and 5,000 pounds of gold were obtained twelve pounds of platinum, two pounds of palladium, and several pounds of selenium. [Please select]
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The regulus from this operation is dissolved, and a compound of selenium and palladium, or of these with platinum, is obtained. [Please select]
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The precipitate is first submitted to the action of ferric chloride to dissolve the copper, and the residue is fused with charcoal and soda to separate the selenium. [Please select]
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