Question

For the energy levels in an atom which one of the following statements is correct?

• A. The 4s sub energy level is at a higher energy than the 3d sub energy level
• B. The M energy level can have maximum of 32 electrons
• C. The second principal energy level can have four orbitals and contain a maximum of 8 electrons
• D. The 5th main energy level can have maximum of 58 electrons

Answer 1

The correct option is C The second principal energy level can have four orbitals and contain a maximum of 8 electrons

(a) $4s<3d$

(b) M – energy level = 3rd orbit = 3s, 3p, 3d subshells = It can have a maximum of $18e^{-}$

(c) Second principal energy level, n = 2, 2s and 2p subshells = Maximum of $8e^{-}$

(d) 5th main energy level, n = 5, (5s, 5p, 5d, 5f, 5g are the subshells) $\to$ Maximum of $50e^{-}$