Search results
Results from the WOW.Com Content Network
Tellurium is a soft (MH 2.25) and brittle semi-metallic element. It is commonly regarded as a metalloid, or by some authors either as a metal or a non-metal. Tellurium has a polyatomic (CN 2) hexagonal crystalline structure. It is a semiconductor with a band gap of 0.32 to 0.38 eV.
Tellurium shows fewer tendencies to anionic behaviour than ordinary nonmetals. [293] Its solution chemistry is characterised by the formation of oxyanions. [294] Tellurium generally forms compounds in which it has an oxidation state of −2, +4 or +6. The +4 state is the most stable. [381]
Oxygen, sulfur, and selenium are nonmetals, and tellurium is a metalloid, meaning that its chemical properties are between those of a metal and those of a nonmetal. [7] It is not certain whether polonium is a metal or a metalloid. Some sources refer to polonium as a metalloid, [2] [27] although it has some metallic properties.
The elements commonly classified as metalloids are boron, silicon, germanium, arsenic, antimony and tellurium. [n 4] The status of polonium and astatine is not settled. Most authors recognise one or the other, or both, as metalloids; Herman, Hoffmann and Ashcroft, on the basis of relativistic modelling, predict astatine will be a monatomic metal.
After you've added an image to your signature, you can adjust its size in the signature box. In AOL Mail, click the Settings icon | choose More Settings. Click Writing email. Go to the Signature section. Hover your cursor over the image in the signature box | click the three dots. Choose the image size you'd like from the list:-Small-Medium-Large
The only metal having an ionisation energy higher than some nonmetals (sulfur and selenium) is mercury. [citation needed] Mercury and its compounds have a reputation for toxicity but on a scale of 1 to 10, dimethylmercury ((CH 3) 2 Hg) (abbr. DMM), a volatile colourless liquid, has been described as a 15. It is so dangerous that scientists have ...
AOL Mail provides a comprehensive set of tools designed to help you craft a distinctive and memorable email signature. Whether you're personalizing fonts, adding images, or formatting text, AOL Mail offers a wide range of options to ensure your signature reflects your unique style and professionalism. Add a signature
A rare and highly radioactive metal (although sometimes classified as a metalloid) with no stable isotopes, polonium is a chalcogen and chemically similar to selenium and tellurium, though its metallic character resembles that of its horizontal neighbors in the periodic table: thallium, lead, and bismuth.