Write the electronic configuration of sodium atom (Atomic number of sodium = 11)

Explanation

The atomic number of sodium is 11. This means that a normal sodium atom contains 11 electrons. Out of 11 electrons of sodium atom, the first 2 electrons will occupy K shell, the next 8 electrons will occupy L shell and the remaining 1 electron will go to M shell. So, the electronic configuration of sodium atom will be :
`underset("2, 8, 1")("K L M")or 2,8,1`.