Documents - an essential trace element Basics What is selenium? discoverer: Berzelius (1817) occurrence in the...

- an essential trace element Basics discoverer: Berzelius (1817) occurrence in the earth‘s crust: 0.05 ppm nonmetal (chalcogen) close chemical relationship with sulphur…

Documents - an essential trace element

- an essential trace element Basics discoverer: Berzelius (1817) occurrence in the earth‘s crust: 0.05 ppm nonmetal (chalcogen) close chemical relationship with sulphur…