Chemistry
Assertion (A): Al3+ ion is isoelectronic with Neon.
Reason (R): Both have the same number of electrons.
- Both A and R are true and R is the correct explanation of A.
- Both A and R are true but R is not the correct explanation of A.
- A is true but R is false.
- A is false but R is true.
Atomic Structure
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Answer
Both A and R are true and R is the correct explanation of A.
Explanation — Aluminium (Al) has electronic configuration 2, 8, 3. Al3+ is formed when Aluminium loses 3 electrons making its electronic configuration 2, 8. The electronic configuration of neon is also 2, 8. So, Al3+ and Ne have the same number of electrons i.e., they are isoelectronic. Hence both assertion (A) and reason (R) are true and reason (R) is the correct explanation of assertion (A).
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