47.5 MB (13.7 MB compressed)
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42.2 x 28.2 cm ⏐ 16.6 x 11.1 in (300dpi)
PHIL DEGGINGER / SCIENCE PHOTO LIBRARY PHIL DEGGINGER / SCIENCE PHOTO LIBRARY
Elemental Selenium. Selenium (Se) is a non-metallic element that exhibits allotropy appearing in a number of forms including a gray crystalline metal-like form called metallic selenium. It is used in the vulcanization of rubber, the manufacture of red glass, in electronics, and in xerography.
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