The instruments, glassware, and chemical reagents necessary for my project were the same as my 19th-century predecessors had.
Elements which are similar as regards their chemical properties have atomic weights which are either of nearly the same value (eg. Pt, Ir, Os) or which increase regularly (eg. K, Ru, Cs).
Saliva has testosterone and estrogen. When you kiss, you're having a chemical experience.
Catalysts offer the promise of making chemical transformations far less polluting.
