Question

11 multiple choice 1 point the electron configuration of a sulfide ion, s?, is _. 1s²2s²2p⁶3s²3p⁶3d¹⁰ 1s²2s²2p⁶3s²3p⁵4s¹ 1s²2s²2p⁶3s²3p⁸ 1s²2s²2p⁶3s²3p⁶

Explanation:

Step1: Recall sulfur's atomic number

Sulfur (S) has an atomic number of 16, with 16 electrons in a neutral atom.

Step2: Determine the sulfide ion

A sulfide ion ($S^{2 -}$) has gained 2 electrons, so it has 16 + 2=18 electrons.

Step3: Write the electron - configuration

Using the Aufbau principle, the electron - configuration of an 18 - electron species is $1s^{2}2s^{2}2p^{6}3s^{2}3p^{6}$.

Answer:

$1s^{2}2s^{2}2p^{6}3s^{2}3p^{6}$ (the last option)