AP Chemistrymediummcq1 pt
Which ion is isoelectronic with neon?
A.Mg²⁺
B.K⁺
C.Cl⁻
D.Ca²⁺
Explanation
Core Concept
Magnesium, [Ne] 3s², loses both valence electrons to leave the 10-electron neon core. Isoelectronic ions share the same total electron count.
Correct Answer
AMg²⁺
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