« first day (4321 days earlier)      last day (50 days later) » 

10:36 AM
1
Q: Elements with most commonly occurring isotope being different from the most stable one

computerIntestinesUsually, stable isotopes have highest abundances, often much higher than radioactive ones. Are there any elements having most commonly occurring isotope different from the most stable isotope?

 
 
4 hours later…
2:46 PM
1
Q: Oxidation of compounds vs elements

firstnamelastname45341I was under the impression that when talking about oxidation/reduction, we are referring to specific elements, and the changes in their oxidation numbers. However, I saw the following reaction referred to as the oxidation of ammonia: $$\ce{4 NH3 + 3 O2 -> 2 N2 + 6 H2O}\tag1$$ $\ce{N}$ changes its...

 

« first day (4321 days earlier)      last day (50 days later) »