1. Konfigurasi elektron unsur yang bernomor t aturan Hund, jika tiga elektron atom 23 adalah. (Ebtanas ). Ketiga aturan dijelaskan secara detail. More lessons will be added soon. ✕ Download. Asas Aufbau, Kaidah Hund, dan Asas Larangan Pauli. 0. 4 plays. . elektron Sub kulit f maksimal 14 elektron Urutan sub kulit diatas bisa ditemukan dalam diagram Mnemonik Moeler: Aturan Hund: dalam subkulit yang sama.

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Retrieved from ” https: This page was last edited on 10 Octoberat In the early days of quantum mechanicsit was proposed that electrons in different orbitals are further apart, so that electron—electron repulsion energy is reduced. There’s a Coulomb repulsion between two electrons to put them in hubd same orbital a spin pairing energy often discussed in Crystal Field Theory.

Certainly, 1s orbitals should be filled before 2s orbitals, because the 1s orbitals have a lower value of n, and thus a lower energy. Banyaknya kotak ditentukan berdasarkan bilangan kuantum magnetik, yaitu:. Unknown 16 Oktober So the ground state is from this more narrowed list: Untuk lebih memahamkan teori ini perhatikan juga contoh di bawah ini:.

Hund’s rules

However, accurate quantum-mechanical calculations starting in the s have shown that the reason is that the electrons in singly occupied orbitals are less effectively screened or shielded from the nucleus, so that such orbitals contract and electron—nucleus attraction energy becomes greater in magnitude or decreases algebraically.

Hund’s first rule states that the lowest energy atomic state is the one that maximizes the total spin quantum number for the electrons in the open subshell. Not to be confused with Hund’s cases.


In what order should they be filled? These rules specify in a simple way how usual energy interactions determine which term includes the ground state. Chandra Pittza 10 Juli Mohon untuk berkenan pemilik materi hhe.

Buah Kasih 23 September Unknown 10 September This is referred to as the LS coupling regime. Electrons tend to minimize repulsion by occupying their own orbitals, rather than sharing an orbital with another electron. Ungkapan yang kedua akan bermanfaat dalam menentukan bentuk molekul dan teori hibridisasi.

Priyo Hartanto 4 Juni Hund’s rules work best for the determination of the ground state of an atom or molecule. However, there’s also a quantum mechanical effect. They are also fairly reliable with occasional failures for the determination of the lowest state of a given excited electronic configuration.

Nama : Rafif Rizmawan NRP : TUGAS KIMIA REKAYASA | Fariz Nur Fitriawan –

Option Hastagemily 29 Oktober It can be understood from ayuran classical picture that if all electrons are orbiting in the same direction higher orbital angular momentum they meet less often than if some of them orbit in opposite directions.

What about the three different 2p orbitals? However we could just as easily draw it “down”. Thus, in the helium atom, Hund’s first rule correctly predicts that the 1s2s triplet state 3 S is lower than the 1s2s singlet 1 S. Aturan ini menyatakan bahwa: So the expectations for Hund’s rules would be switched.

8.10: Hund’s Rules Determine the Term Symbols of the Ground Electronic States

According to the first rule, electrons always enter an empty orbital before they pair up. Untuk menentukan letak periode suatu unsur relatif mudah. Devi Alfani 10 Desember Unknown 27 Agustus Faris Zuhair 9 Desember The direction is furthermore arbitrary except in, say, a magnetic or electric field.


Berarti walaupun penulisan 3d6 4s2 untuk fe misalnya, itu bil. By convention we usually draw the first electron in each orbital as “up” positive spin. All things being equal, the total spin angular momentum of the 1 electron system would be opposite in sign to whatever hhund total spin angular momentum of the 5 electron system is. Similarly for organic molecules, the same rule predicts that the first triplet state denoted by T 1 in photochemistry is lower than the first excited singlet state S 1which is generally correct.

Bila subkulit terakhirnya pada s atau p maka digolongkan dalam golongan Hud utama sedangkan bila subkulit terakhirnya pada d maka digolongkan dalam golongan B transisi. Rank these terms associated with hune electronic configuration of an atom based on energy via Hund’s rules:. Steph Enson 6 Desember Coba perhatikan contoh diagram elektron di bawah ini, khususnya pada bagian akhirnya:.

Hund’s First Rule Maximize Spin Multiplicity According to the first rule, electrons always enter an empty orbital before they pair up.