Questions: Write the full electron configuration for S^2-.

Transcript text: Write the full electron configuration for $\mathrm{S}^{2-}$.

Solution

Step 1: Determine the Atomic Number of Sulfur

Sulfur (S) has an atomic number of 16, which means it has 16 protons and, in its neutral state, 16 electrons.

Step 2: Account for the Charge of the Ion

The ion $\mathrm{S}^{2-}$ has gained 2 additional electrons, making the total number of electrons 18.

Step 3: Write the Electron Configuration

To write the electron configuration, we fill the orbitals in the order of increasing energy levels:

The full electron configuration for $\mathrm{S}^{2-}$ is: \[ \boxed{1s^2 \, 2s^2 \, 2p^6 \, 3s^2 \, 3p^6} \]

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