Question
The ionic radii in (Ã…) of N ^ 3- , O ^ 2- and F ^ - are respectively.
BITSAT
Chemistry
Classification of Elements and Periodicity in Properties
2024
BITSAT 2024 (Memory Based Paper 3)
BITSAT Chemistry Question (2024) — Solution
Options
- A. 1.71, 1.40 and 1.36
- B. 1.71, 1.36 and 1.40
- C. 1.36,1.40 and 1.71
- D. 1.36,1.71 and 1.40
Answer
A. 1.71, 1.40 and 1.36
Step-by-step solution
N ^ 3- , O ^ 2- and F ^ - are isoelectronics ( 10 electrons) species. Their ionic radii will decrease with increase in magnitude of the nuclear charge from N ( Z =7) to O (Z=8) and F(Z=9). i.e. array ccc N ^ 3- & O ^ 2- & F ^ - \\ 1.71 Ã… & 1.40 Ã… & 1.36 Ã… array Hence, option (1) is correct.
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