Element Data Atomic Symbol: Se Atomic Number: 34 Atomic Weight: 78.96 Isotopes and Abundances: 74 Se 0.9 %, 76 Se 9.2 %, 77 Se 7.6 %, 78 Se 23.7 %, 80 Se 49.8 %, 82 Se 8.8 % 1 Atm Melting Point: 490 K 1 Atm Boiling Point: 958.1 K Common Valences: +6,...
function,traceelement Introduction SeleniumwithAtomicNumberZ=34 andMassNumberA=78.96isingroupVIA andperiod4oftheperiodictableofthe elements. # Ithassulfurontopandarsenicnext toit.Bothsulfurandarsenichavesomehealing properties,andsinceneighborsintheperiodic ...
Selenium chemical element Sign with atomic number and atomic weight Periodic Table Element,站酷海洛,一站式正版视觉内容平台,站酷旗下品牌.授权内容包含正版商业图片、艺术插画、矢量、视频、音乐素材、字体等,已先后为阿里巴巴、京东、亚马逊、小米、联想、奥美、
atomic number 34,Se chemical element,element- any of the more than 100 known substances (of which 92 occur naturally) that cannot be separated into simpler substances and that singly or in combination constitute all matter fool's gold,iron pyrite,pyrite- a common mineral (iron disulfide) that...
Selenium, (in Greek σελήνηselene meaning “Moon”), was discovered in 1817 by Jöns Jacob Berzelius, and is is a trace mineral present in the soil and a variety of foods. It is a non-metal element with the Chemical symbol Se and has the atomic number 34 on the Periodic Tab...
The Selenium , with the cas number 7782-49-2, a chemical element with the atomic number 34, and, also exists in many non-conductive forms: a black glass-like allotrope, as well as several red crystalline forms built of eight-membered ring molecules. It is found in economic quantities in...
A highly toxic, nonmetallic element in group 16, symbol Se, atomic number 34; steel-gray color; soluble in carbon disulfide, insoluble in water and alcohol; melts at 217°C; and boils at 690°C; used in analytical chemistry, metallurgy, and photoelectric cells, and as a lube-oil stabilize...
英文解释 n. 1.a toxic nonmetallic element related to sulfur and tellurium; occurs in several allotropic forms; a s 网络释义 Selenium 硒(口服); 硒酸盐; 硒光电管; 硒; Selenium Steel 加硒钢; selenium tetrachloride 四氯化硒; selenium analyzer 硒含量分析仪; selenium pollution 硒污染;...
Seleniumhas six naturalstable isotopes:74Se (0.9%),76Se (9.4%),77Se (7.6%),78Se (23.8),80Se (49.6%), and82Se (8.7%). It usually occurs in thesulfide oresof theheavy metalsbut rarely as the free element. Volcanic soils are enriched in selenium as are some coal deposits.Selenium co...
See more Selenium products.Selenium (atomic symbol: Se, atomic number: 34) is a Block P, Group 16, Period 4 element with an atomic radius of 78.96. The number of electrons in each of Selenium's shells is 2, 8, 18, 6 and its electron configuration is [Ar] 3d104s24p4. The seleniu...