Parallel electrons

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Sarah Salam 1J
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Joined: Wed Sep 30, 2020 9:31 pm

Parallel electrons

Postby Sarah Salam 1J » Sun Nov 08, 2020 8:32 am

When would electrons be parallel? I'm a bit confused on what Hund's rule is saying about this.

Tae Pasawat 2A
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Joined: Tue Oct 06, 2020 12:16 am

Re: Parallel electrons

Postby Tae Pasawat 2A » Sun Nov 08, 2020 9:08 am

What do you mean by parallel? if you mean electrons traveling in the same direction in a single orbital, this is not possible as electrons must always be in an opposite spin as stated by Pauli's exclusion principle. The hunds rule states that electrons will fill different orbitals within a subshell each with parallel spin (so 1 electron in each orbital for now, all with the same spin) and once there are enough electrons, it will then fill an orbital which will bring the number to 2e- in one of the orbitals, and this is when the electrons in a single orbital have opposite spin.

Mikayla Kwok 3K
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Joined: Wed Sep 30, 2020 9:51 pm

Re: Parallel electrons

Postby Mikayla Kwok 3K » Sun Nov 08, 2020 5:15 pm

The parallel electrons in Hund's rule is just stating that when distributing electrons into different orbitals, every electron in the half-filled orbitals have the same spin (like all three electrons in the 2p^3 subshell) would be either spin-up (+1/2) or spin-down(-1/2). This is because electrons with parallel spins in different orbitals decreases electrostatic repulsion between them, making them more stable.

Eva Becker
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Joined: Wed Sep 30, 2020 9:40 pm

Re: Parallel electrons

Postby Eva Becker » Sun Nov 08, 2020 5:31 pm

Hund's Rule is saying that electrons will fill the orbitals alone before doubling up. An orbital can house 2 electrons spinning in opposing directions, however each orbital will fill with one singular electron before 2 occupy the same one. To draw an analogy: if a house has 3 rooms and a family with 2 children moves in, the two kids are more likely to have their own separate rooms before sharing; they'll only share if more kids (electrons) move in.

Posts: 101
Joined: Wed Sep 30, 2020 10:09 pm

Re: Parallel electrons

Postby Armen_Isayan_2L » Sun Nov 08, 2020 8:51 pm

According to Hund, electrons in the ground state, which is the lowest energy electron configuration, would finally have electrons become parallel. Hence, each orbital of the sub shell is occupied with electrons of parallel spin.

Andrew Yoon 3L
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Joined: Wed Sep 30, 2020 9:36 pm

Re: Parallel electrons

Postby Andrew Yoon 3L » Sun Nov 08, 2020 11:53 pm

Electrons would be parallel when ground state electrons would fill two or more orbitals before pairing together in the same orbital. This means that the electrons in each orbital would have the same spin rather than when 2 electrons are in the same orbital and when they have opposite spins.

Susan Chamling 1F
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Joined: Wed Sep 30, 2020 9:42 pm

Re: Parallel electrons

Postby Susan Chamling 1F » Mon Nov 09, 2020 12:01 am

Hund's Rule states that due to electron repulsion electrons in the same subshell, l, will occupy different orbitals with parallel spins and are unpaired. Paired electrons have opposite spins and are in the same orbital.

Izamary Marquez 2H
Posts: 94
Joined: Wed Sep 30, 2020 9:44 pm

Re: Parallel electrons

Postby Izamary Marquez 2H » Fri Nov 13, 2020 9:34 pm

After reading these comments I am still confused... What does it mean for the electrons to be "parallel"? Does this change the atoms/molecules that they are likely to bond with?

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