Diatomic Selenium (Se2) is the basic form of the element Selenium (Se) in gas state at standard temperature and pressure. Selenium is a chemical element in the periodic table with the symbol Se and atomic number 34.
1.1 Common name: Selenium; English name: Selenium.
1.2 The atomic mass of Se2 is 78.96 u.
1.3 The atomic weight of Se2 is 157.92 amu.
1.4 Ion structure of Se2: Selenium forms Se2- ion.
2.1 Physical properties of Se2: Selenium in the form of Se2 is purple-red in color, odorless, tasteless. The pH of Se2 is undefined as it is not a liquid or soluble in water.
2.2 Chemical properties of Se2: Se2 self-reacts to form Se8. It can also react with chlorine to produce SeCl4.
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Se2 typically does not directly participate in chemical reactions with metals, acids, or other nonmetals.
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Synthesis of Se2:
Se2 is not directly synthesized in the lab. On an industrial scale, Se2 is produced from the waste treatment of copper mining. The most common synthesis method is through electrolysis or thermolysis.
Note: Selenium and its compounds are all toxic. Be careful when working with them.