š Rules for Electron Distribution
Rule 1: Maximum Electrons Formula
The maximum number of electrons in a shell is given by 2nĀ², where 'n' is the orbit number (1, 2, 3, ...)
Rule 2: Outermost Shell Limit
The maximum number of electrons that can be accommodated in the outermost orbit is 8
Rule 3: Step-wise Filling
Electrons are not accommodated in a given shell unless the inner shells are filled. Shells are filled in a step-wise manner.
Practice Questions
Q1:
Write the distribution of electrons in carbon and sodium atoms.
Q2:
If K and L shells of an atom are full, then what would be the total number of electrons in the atom?
A1:
Carbon (6): K-2, L-4 | Sodium (11): K-2, L-8, M-1
A2:
K shell (full) = 2 electrons, L shell (full) = 8 electrons. Total = 10 electrons (Neon)