Search results
Results from the WOW.Com Content Network
This is a list of chemical elements by the stability of their isotopes. Of the first 82 elements in the periodic table , 80 have isotopes considered to be stable. [ 1 ] Overall, there are 251 known stable isotopes in total.
In chemistry, chemical stability is the thermodynamic stability of a chemical system, in particular a chemical compound or a polymer. [ 1 ] Thermodynamic stability occurs when a system is in its lowest energy state , or in chemical equilibrium with its environment.
Metabolite damage can occur through enzyme promiscuity or spontaneous chemical reactions. Many metabolites are chemically reactive and unstable and can react with other cell components or undergo unwanted modifications. Enzymatically or chemically damaged metabolites are always useless and often toxic.
Graph of nuclides (isotopes) by type of decay. Orange and blue nuclides are unstable, with the black squares between these regions representing stable nuclides. The continuous line passing below most of the nuclides comprises the positions on the graph of the (mostly hypothetical) nuclides for which proton number would be the same as neutron ...
Mercury(I) oxide, also known as mercurous oxide, is an inorganic metal oxide with the chemical formula Hg 2 O. It is a brown/black powder, insoluble in water but soluble in nitric acid. With hydrochloric acid, it reacts to form calomel, Hg 2 Cl 2. [4] Mercury(I) oxide is toxic but without taste or smell.
This feature makes RNA chemically unstable compared to DNA, which does not have this 2’ -OH group and thus is not susceptible to base-catalyzed hydrolysis. [1] Mechanism of base catalyzed RNA hydrolysis. 1) Base-catalyzed deprotonation of the 2′-OH group, enabling the deprotonated 2′ hydroxyl's nucleophilic attack on the adjacent phosphorus.
Nuclear chemistry is a sub-discipline of chemistry that involves the chemical reactions of unstable and radioactive elements where both electronic and nuclear changes can occur. The substance (or substances) initially involved in a chemical reaction are called reactants or reagents.
Unfortunately, the densest depleted uranium oxide is also the most chemically unstable. DUO 2 has a maximum theoretical density of 10.5 g/cm 3 at 95% purity. However, under oxidation conditions, this material readily transforms into the more stable depleted uranium trioxide (DUO 3 ) or depleted triuranium octaoxide (DU 3 O 8 ). [ 2 ]