Atomic symbol: The atomic symbol ... Let's try an example: We can choose selenium, which has an atomic number of 34, meaning there are 34 total electrons in a neutral atom of selenium.

__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 ...

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 ...

The periodic table’s arrangement also allows scientists to discern trends in element properties, including electronegativity, ionization energy, and atomic radius. Many scientists worked on the ...