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,...
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...
Selenium has atomic number 34, meaning each atom has 34protons. The element symbol of selenium is Se. Selenium was discovered jointly in 1817 by Swedish chemists Jöns Jakob Berzelius (1779–1848) and Johan Gottlieb Gahn (1745–1818). Although it is uncommonly found, selenium does exist in ...
SeleniumwithAtomicNumberZ=34 andMassNumberA=78.96isingroupVIA andperiod4oftheperiodictableofthe elements. # Ithassulfurontopandarsenicnext toit.Bothsulfurandarsenichavesomehealing properties,andsinceneighborsintheperiodic tablehavesimilarproperties,itisnotsurprising ...
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...
Selenium (pronounced /sɨˈliːniəm/ sə-LEE-nee-əm) is a chemical element with the atomic number 34, represented by the chemical symbol Se, an atomic mass of 78.96. It is a nonmetal, chemically related to sulfur and tellurium, and rarely occurs in its elemental state in ...
Atomic Number:34 Symbol:Se Atomic Weight:78.96 Discovery:Jöns Jakob Berzeliusand Johan Gottlieb Gahn(Sweden) Electron Configuration:[Ar] 4s23d104p4 Word Origin:Greek Selene: moon Properties:Selenium has an atomic radius of 117 pm, a melting point of 220.5°C, boiling point of 685°C,with ...
The atomic number is shown above the element’s symbol on the periodic table. The number represents how many protons and neutrons it has. In this element, the number is 10, which means there’s 10 protons and neutrons. The atomic mass tells us the mass of the atom, for neon the mass...
Write the electron configuration, orbital filling diagram, and determine the number of valence electrons for the Rb. What is similar to the elements in the same group? Create the atomic orbital diagram for chlorine. In a chlorine atom, which subshells c...
An atomic cation with a charge of +1 has the following electron configuration: (Ar) 4s^2 3d^{10} 4p^1. What is the chemical symbol for the ion? An Se ion has a mass number of 78 and a charge of -2. Determine the number ...