UPSC NDA I 2012 General Ability Paper

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Question : 70 of 150

Marks: +1, -0

Which one among the following is correct regarding ‌20Ne23Na+,‌19F−, and ‌24Mg2+ ?

They are isomers of each other
They are isotopes of each other
They are isoelectronic with each other
All of the above

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