Which species does not have an octet of electrons for its outer core? A)C^4- B)P^3- C)O^2- D)Mg⁺

Question

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Magnesium (Mg) has two valence electrons and sulfur (S) has six. When they combine to form MgS, the two electrons from magnesium will pair up with two of sulfur's six electrons, leaving sulfur with four lone pairs and a total of eight electrons in its outermost shell. However, in Mg⁺, there is an additional electron added to the system, making it an odd number of electrons and therefore, not having an octet of electrons for its outer core.

Which Species Does Not Have an Octet of Electrons for Its