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JEE Main Chemistry question

ChemistryClassification of Elements and Periodicity in PropertiesJEE Main

Among the following, the number of species that are isoelectronic with Ne is . N^{3-}, O^{2-}, Cl, F, F^-, O, Na^+, Mg^+, Mg^{2+}, O^-

Answer: 5

Solution

Ne has 10 electrons. Checking each species: ✓, ✓, ✗, ✗, ✓, ✗,

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Question ID VK-133901