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17 godz. temu · Molybdenum. body-centered cubic (bcc) ( cI2) Molybdenum is a chemical element; it has symbol Mo (from Neo-Latin molybdaenum) and atomic number 42. The name derived from Ancient Greek Μόλυβδος molybdos, meaning lead, since its ores were confused with lead ores. [10]
17 godz. temu · Microscopic structure The amorphous structure of glassy silica (SiO 2) in two dimensions. No long-range order is present, although there is local ordering to the tetrahedral arrangement of oxygen (O) atoms around the silicon (Si) atoms. Microscopically, a single crystal has atoms in a near-perfect periodic arrangement; a polycrystal is composed of many microscopic crystals; and an amorphous ...
17 godz. temu · Etymology. The word ant and the archaic word emmet are derived from ante, emete of Middle English, which come from ǣmette of Old English; these are all related to Low Saxon e(e)mt, empe and varieties (Old Saxon emeta) and to German Ameise (Old High German āmeiza).All of these words come from West Germanic * ǣmaitjōn, and the original meaning of the word was "the biter" (from Proto-Germanic ...
17 godz. temu · Vanadium is a chemical element; it has symbol V and atomic number 23. It is a hard, silvery-grey, malleable transition metal. The elemental metal is rarely found in nature, but once isolated artificially, the formation of an oxide layer ( passivation) somewhat stabilizes the free metal against further oxidation .
17 godz. temu · Sunscreen, also known as sunblock or sun cream, is a photoprotective topical product for the skin that helps protect against sunburn and prevent skin cancer.Sunscreens come as lotions, sprays, gels, foams (such as an expanded foam lotion or whipped lotion), sticks, powders and other topical products.Sunscreens are common supplements to clothing, particularly sunglasses, sunhats and special sun ...
17 godz. temu · Iridium is a chemical element; it has symbol Ir and atomic number 77. A very hard, brittle, silvery-white transition metal of the platinum group, it is considered the second-densest naturally occurring metal (after osmium) with a density of 22.56 g/cm 3 (0.815 lb/cu in) [8] as defined by experimental X-ray crystallography. [a] 191 Ir and 193 Ir ...
17 godz. temu · The Korean alphabet, known as Hangul (English: / ˈ h ɑː n ɡ uː l / HAHN-gool; Korean: 한글; Hanja: 韓㐎) in South Korea and Chosŏn'gŭl (조선글; 朝鮮㐎) in North Korea, is the modern writing system for the Korean language. The letters for the five basic consonants reflect the shape of the speech organs used to pronounce them. They are systematically modified to indicate ...
