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Count electrons with a given l (s, p or d) in the configuration of an atom or ion

This type of question, asked 3 times: 2021 Paper 13, 24 Jan 2023, 4 Apr 2025. All 3 questions below, oldest first.

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  1. Question 1

    2021 Paper 13

    42
    Number of electrons in p-orbitals of Vanadium

  2. Question 2

    24 Jan 2023

    129
    The number of s-electrons present in an ion with 55 protons in its unipositive state is

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  3. Question 3

    4 Apr 2025

    113
    Consider the ground state of chromium atom (Z=24)(Z = 24). How many electrons are with Azimuthal quantum number l=1l= 1 and l=2l= 2 respectively?

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