The oxygen atom isoxidation reaction Smallest inatom, the chemical symbol is O, which can form oxygen (Otwo）And oxides (e.g. FethreeOfourEtc.).Oxygen atoms are very active and do not exist in nature.
The number of outer electrons of oxygen atom is 6. Four of these six electrons form two pairs, and the other two exist alone.From the classical mechanical system: 1. Atoms have lifetime 2. Oxygen atoms have isotopes, and the quality of isotopes is different.3. Some isotopes will decay and emit rays, so the mass will be small.Therefore, it is concluded that the mass of a fixed oxygen atom remains unchanged in a short time.
Oxygen atoms are very active and do not exist in nature.
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oxygen，chemical formulaOtwo，Formula quantity32.00, colorless and odorless gas, the most common single substance form of oxygen element.Melting point - 218.4 ℃, boiling point - 183 ℃.It is insoluble in water, and about 30mL oxygen is dissolved in 1L water.Oxygen accounts for about 21% in the air.Liquid oxygen is sky blue.The solid oxygen is blue crystal.It is not very active at room temperature and is not easy to interact with many substances.But it is very active at high temperature and can combine with many elements directlyElectronegativityafterfluorineof
Oxygen is the most widely distributed in nature, accounting for 48.6% of the crust massabundanceThe highest element.stayHydrocarbonsOxygen is required for oxidation of oxygen, wastewater treatment, rocket propellant, and breathing of animals and people in aviation, aerospace and diving.Oxygen is consumed by animal respiration, combustion and all oxidation processes (including organic matter decay).But the oxygen in the air can be continuously supplemented through the photosynthesis of plants.The metallurgical process is inseparable from oxygen.To strengthennitric acidAnd the production process of sulfuric acid also needs oxygen.Use oxygen instead of airsteamThe mixture ofGasifierMedium, high calorific value gas can be obtained.Medical gas is extremely important.
