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Chemistry Quiz +1 Kunnamanagalam HSS

All 20 questions from this finished quiz, with the correct answer and explanation. Finished 9 Oct 2026, 11:44 pm IST.
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  1. 1. Which of the following isoelectronic species has the largest radius?

    A. Na⁺

    B. F⁻

    C. O²⁻

    D. N³⁻

    Answer: D. N³⁻

    Why: For isoelectronic species, radius increases as nuclear charge decreases. N³⁻ has the smallest nuclear charge (Z = 7), so it is the largest.

  2. 2. How many radial nodes are present in a 3p orbital?

    A. 0

    B. 1

    C. 2

    D. 3

    Answer: B. 1

    Step-by-step solution

    1. 1The number of radial nodes is n−l−1n - l - 1.
    2. 23−1−1=13 - 1 - 1 = 1

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