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

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Assertion (A): Helium is placed in ‘p’ block of modern periodic table

Reason (R): Differentiating electron in Helium enters into ‘p’ orbital

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Correct option: C

A is true but R is false

Option C is correct because Helium is placed in the 's' block, not the 'p' block, and its differentiating electron enters the 's' orbital.

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