Question

The atomic number of silicon is 14. Its electronic configuration in the ground state will be_______.

• A. $1s^2,2s^2,2p^6,3s^2,3p^2$
• B. $1s^2,2s^2,2p^6,3s^1,3p^3$
• C. $1s^2,2s^2,2p^8,3s^2$
• D. $1s^2,2s^2,2p^6,3s^4$

Answer 1

The correct option is A $1s^2,2s^2,2p^6,3s^2,3p^2$

We know that s orbital contains maximum 2 electrons and p contains maximum 6 electrons. s-orbitals filled by electron first then p-orbitals. According to this , option A should be right.