Of the following electron configurations of neutral atoms, which represents an atom in an
excited state?
A 1s2 2s2 2p5
B 1s2 2s2 2p5 3s2
C 1s2 2s2 2p6 3s1
D 1s2 2s2 2p6 3s2 3p2
E 1s2 2s2 2p6 3s2 3p
Quote from: Ansam on September 20, 2022, 01:00:47 PM
Of the following electron configurations of neutral atoms, which represents an atom in an
excited state?
A 1s2 2s2 2p5
B 1s2 2s2 2p5 3s2
C 1s2 2s2 2p6 3s1
D 1s2 2s2 2p6 3s2 3p2
E 1s2 2s2 2p6 3s2 3p
Electron in higher
energy level then its normal or ground state.Like in case of carbon its ground state is
1s2 2s2 2p2 and excited state is
1s2 2s1 2p3 In the given options all are regular ground electronic configurations except B where the electron should be in 2p rather than 3s .