What is the electron configuration of S²⁻?

Question

Quizplus · Accepted Answer

The electron configuration of the given particles should follow the Aufbau principle, which states that electrons fill orbitals in order of increasing energy.

Starting with the first element "SS", which has atomic number 16, we write "1s2 2s2 2p6 3s2 3p4".

Moving on to "1U1P12", which has atomic number 121, we write "1s2 2s2 2p6 3s2 3p6 4s2 3d10 4p6 5s2 4d10 5p6 6s2 4f14 5d10 6p3 7s2 5f14 6d10 7p1".

For "2S1S1P0", we write "1s2 2s2 2p6".

For "S1U1P1−", we remove one electron from the configuration for "1U1P12", giving us "1s2 2s2 2p6 3s2 3p6 4s2 3d10 4p6 5s2 4d10 5p6 6s2 4f14 5d10 6p3 7s2 5f14 6d10 7p0".

For "S1S1P0", we already wrote the configuration as "1s2 2s2 2p6".

Putting it all together, we get the electron configuration "1s2 2s2 2p6 3s2 3p6 4s2 3d10 4p6 5s2 4d10 5p6 6s2 4f14 5d10 6p3 7s2 5f14 6d10 7p1 1s2 2s2 2p6 3s2 3p4 1s2 2s2 2p6 3s2 3p0".

The correct answer is therefore (D).

What Is the Electron Configuration of S2−

What Is the Electron Configuration of S²⁻