NEET UG CHEMISTRY MCQ: CLASSIFICATION OF ELEMENTS AND PERIODICITY IN PROPERTIES

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Analyzing +4 | -1

Identify the least stable ion amongst the following:

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Correct option: B

\mathrm{B}{\mathrm{e}^ - }

Option B (

\mathrm{B}{\mathrm{e}^ - }

) is the least stable ion because adding an electron to Beryllium (Be) disrupts its stable, completely filled s-orbital configuration.

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