Promethium is what is known as a "lanthanide" or "rare-earth metal." This metal is one of 15 elements that occupy the lower portion of the periodic table and carry the atomic numbers 57 through 71.
Apoptosis, the dominant form of programmed cell death, refers to the shedding of the leaves from trees in Greek. The distinct morphological changes of cells undergoing apoptosis are sequentially ...
This is a general chemistry course for science and engineering students. Topics include quantitative tools (measurements, precision, and accuracy), substances (formulas/names, composition, solutions, ...