Sample from the RGB Set. The Red Green and Blue company in England sells a very nice element collection in several versions.Max Whitby, the director of the company, very kindly donated a complete set to the periodic table table. To learn more about the set you can visitmy page about elem...
Selenium (atomic no. 34) is a member of Group VI, also known as the S family, in the periodic table. It has specific gravities of 4.79 g/cm 3 for the metallic (gray) form, or 4.28 g/cm 3 for the vitreous (black) form. It has an atomic weight of 78.96, melting point of (...
"A New Scale Of Electronegativity Of 54 Elements Of Periodic Table Based On Polarizability Of Atoms." Journal of Theoretical and Computational Chemistry, volume 5, number 4, 2006, pp. 895–911. doi:10.1142/S0219633606002726 Greenwood, N. N., and A. Earnshaw. Chemistry of the Elements, 2nd ...
13.2.2Location of Selenium in the Periodic Table Seleniumbelongs to the well-known family ofchalcogensand lies in the fourth row of the periodic table. Its inner shells (1s2, 2s2, 2p63s2, 3p6, 3d10) are completely filled, and its outer shell (4s2, 4p4) configuration approaches that ...
Selenium is used in anti-dandruff shampoos. Gray selenium conducts electricity better when light is shined on it. Early photoelectric circuits and solar cells used selenium metal. Compounds containing selenium in the -2 oxidation state are called selenides. ...
Elements in the same group in the periodic table (a) have similar chemical properties. (b) are called isotopes. (c) have consecutive atomic numbers. (d) make up a period of elements. Refer to the periodic table and give the period and group number for...
Selenium is a non metallic chemical element, member of the group XVI of the periodic table. In chemical activity and physical properties it resembles sulfur and tellurium. Selenium appearsin a number of allotropic forms: the most popular are a red amorphous powder, a red crystalline material, an...
Selenium is an element on the periodic table. In trace amounts this mineral is an essential component for a healthy, balanced diet. It is found in the cells of the liver, kidneys, spleen, pancreas and testes, and plays an important role in the normal function of many of the organs and...
15 The period 4 elements gallium (Ga), germanium (Ge), arsenic (As) and selenium (Se) are the elements below aluminium, silicon, phosphorus and sulfur in the Periodic Table, a portion of which is shown below.period 3 elements Al si P S period 4 elements G a Ge As Se The properties...
24 Sulfur and selenium, Se, are in the same group of the Periodic Table. From this, we would expect selenium to form compounds having the formulae ___ c. A Se_{2}O, Na_{2}Se and NaSeO SeO_{2}, Na_{2}Se and NaSeO. C SeO_{2}, Na_{2}Se and Na_{2}SeO_{4} SeO_{3...