polonium
Tellurium - Tellus, which is latin for earth. Helium - Helios, meaning the sun. Selenium- Selene, which is Greke for moon.
Selenium was named after the Greek word "selene," which means moon. This is because selenium's properties were found to be similar to tellurium, which was named after the Earth, and sulfur, which was named after the Sun. The name selenium reflects its position in the same chemical group as tellurium and sulfur.
Oxygen, Sulphur, Selenium, Tellurium, Polonium, and Livermorium. Have similar chemical properties as they are all in Group VIA (16). However, the last two are radio-active and not found in the open lab.
Selenium and tellurium are similar to sulfur.
Sulfur, Tellurium, Selenium, and Plutonium
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Carbon dioxide is not part of sulfur, tellurium, selenium, or polonium. Carbon dioxide is a compound composed of carbon and oxygen atoms. Sulfur, tellurium, selenium, and polonium are elements on the periodic table that do not contain carbon or oxygen in their chemical structures.
Examples: germanium, selenium, tellurium, antimony, boron, silicon.
Selenium, tellurium, and polonium are metalliod semiconductors (that means, their electrical properties are between those of a metal and an insulator). Nevertheless, tellurium, as well as selenium, is often referred to as a metal when in elemental form.
This element is tellurium with a covalent atomic radius of 140 pm.
Raymond Foster Miller has written: 'The optical constants of crystals of selenium and tellurium for wave lengths from 3000 to 5000 angstroms' -- subject(s): Crystallography, Physical optics, Selenium, Tellurium
The members are sulfur,selenium,tellurium,polonium