Explanation:
Sulfide anion is depicted by S²⁻
Sulfur is an element with atomic number of 16;
In an atom;
there are subatomic particles:
Protons are the positively charged particles
Electrons are negatively charged
Neutrons do not carry any charges.
In a neutral atom, the number of protons and electrons are the same.
In an anion, such atoms have gained electrons.
For sulfide anion, the number of electrons will increase by 2, giving a total of 18 electrons.
The electronic configuration will then be:
S²⁻ = 1s² 2s² 2p⁶ 3s² 3p⁶
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