what is an electron configuration, and what does it tell you about the periodic table?

Answer 1

The Electron Configuration is the arrangement of electrons in an atom or molecule. In relation to the Periodic Table, the chemical properties, (i.e.characteristics of a substance that determine how it will react with other substances), of an atom are largely determined by the arrangement of the electrons in its outermost shell.

Answer 2

Electron configuaration is how many electons are in each shell. If the outer shell is missing one it will be in the same family on the periodic table.