If you want to know where the data comes from for any particular property, then select that property. You'll see graphs for the properties as well.
Elemental selenium is relatively nontoxic and is considered to be an essential trace element.
Hydrogen selenide in a concentration of 1.5 ppm is intolerable to man. Which element is a member of the halogen group and is a heavy, volatile, mobile, reddish-brown liquid whose red vapour has a strong unpleasant odour. All rights reserved.