kislorod
Kislorod, known in English as oxygen, is the chemical element with symbol O and atomic number 8. It is a colorless, odorless gas at room temperature and pressure. In its most common form, O2, two oxygen atoms share a double bond. Oxygen is paramagnetic due to two unpaired electrons and forms a wide range of oxides with nearly all elements.
It is the third most abundant element in the universe by mass and accounts for about 21
Production and uses: industrially, oxygen is produced mainly by fractional distillation of liquid air or other
Biological and ecological role: oxygen is essential for aerobic respiration, enabling energy production in most multicellular
History and naming: oxygen was identified in the 1770s by Carl Wilhelm Scheele and Joseph Priestley. Antoine