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

1 Easy

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Analyzing +4 | -1

The least stable ion among the following is

View answer and explanation

Correct option: B

B{e^ - }

Option B (

Be^−

) is correct because adding an electron to Be, which already has a stable, filled s-orbital configuration (

2s^2

), requires significant energy.

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