It also helps them remember that, unlike fluorine, phosphorus begins with the letter P." Atomic symbol: P. Atomic number: 15. Dr. JaimeLee Iolani Rizzo — Nitrogen.

The chemical symbol for oxygen is O. Makes sense. Calcium gets repped by a Ca. Sounds good. Hydrogen? H. Cobalt? Co. Lithium? Li. With you so far. Lead? Pb. There are actually a few things that ...

__1803: __English chemist-physicist John Dalton starts using symbols to represent the atoms of different elements. Dalton, considered the father of modern atomic theory, made a logbook entry that ...

IN a recent issue of NATURE (Mar. 9, p. 390) mention is made of the fact that the English Commission on Atomic Weights adopts for the atomic weight of phosphorus the value 30.98(2), this being ...