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  • Thorium Orbital Notation: Understanding Electron Distribution (Th, 90)
    Here's how to determine the orbital notation of thorium (Th), which has an atomic number of 90:

    1. Electronic Configuration:

    * Thorium's electronic configuration: 1s² 2s² 2p⁶ 3s² 3p⁶ 4s² 3d¹⁰ 4p⁶ 5s² 4d¹⁰ 5p⁶ 6s² 4f¹⁴ 5d¹⁰ 6p⁶ 7s² 5f¹⁴ 6d²

    2. Orbital Notation:

    The orbital notation represents the distribution of electrons within each subshell using arrows. Each arrow represents an electron, and arrows pointing in opposite directions represent spins.

    * 1s: ↑↓

    * 2s: ↑↓

    * 2p: ↑↓ ↑↓ ↑↓

    * 3s: ↑↓

    * 3p: ↑↓ ↑↓ ↑↓

    * 4s: ↑↓

    * 3d: ↑↓ ↑↓ ↑↓ ↑↓ ↑↓

    * 4p: ↑↓ ↑↓ ↑↓

    * 5s: ↑↓

    * 4d: ↑↓ ↑↓ ↑↓ ↑↓ ↑↓

    * 5p: ↑↓ ↑↓ ↑↓

    * 6s: ↑↓

    * 4f: ↑↓ ↑↓ ↑↓ ↑↓ ↑↓ ↑↓ ↑↓ ↑↓ ↑↓ ↑↓ ↑↓

    * 5d: ↑↓ ↑↓ ↑↓ ↑↓ ↑↓ ↑↓

    * 6p: ↑↓ ↑↓ ↑↓

    * 7s: ↑↓

    * 5f: ↑↓ ↑↓ ↑↓ ↑↓ ↑↓ ↑↓ ↑↓ ↑↓ ↑↓ ↑↓ ↑↓

    * 6d: ↑ ↑

    Explanation:

    * Each orbital (s, p, d, f) can hold a maximum number of electrons:

    * s: 2 electrons

    * p: 6 electrons

    * d: 10 electrons

    * f: 14 electrons

    * The subshells are filled in order of increasing energy levels.

    Important Note: Thorium is a heavy element, and the orbital notation can be more complex due to relativistic effects and exceptions to the Aufbau principle. However, this basic representation provides a good understanding of the electron distribution in its atomic orbitals.

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