Periodic Table. Electron Configuration of the Atoms of the Elements. Periodic Table. Took form between 1868 and 1870 by Lothar Meyer in Germany and Dimitri Mendeleev in Russia.
Electron Configuration of the Atoms of the Elements
-m,…,0,…,m. This is the l quantum number. It represents the orientation of the orbital.
Shell structure for the atoms in the periodic table appears thus –
3s 3p 3d
4s 4p 4d 4f
5s 5p 5d 5f
6s 6p 6d
7s 7p 7d
(a) How many protons, neutrons, and electrons are in this isotope? (b) What is the symbol for the lead isotope with 132 neutrons? (c) What is the atomic symbol and name of atom with the same mass number as in (b) and 131 neutrons?