Write the electronic distribution in various shells for an element with atomic number 19 according to Bohr-Bury scheme.
Atomic number is 19 which is actually Potassium (K),
so electronic configuration according to Bohr-Bury scheme of Potassium will be-
K19 = , ,
K = Maximum 2 electrons
L = Maximum 8 electrons
M = Maximum 18 electrons (but first 8 electrons are filled and after that 2 electrons are filled in N shell to satisfy Octate rule, after filling 2 electrons in N shell, again electrons will be filled in M shell till it reaches 18).