Why do electronegative atoms have lower energy?

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Alyssa_Hsu_2K
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Joined: Wed Sep 21, 2016 3:00 pm

Why do electronegative atoms have lower energy?

Postby Alyssa_Hsu_2K » Sun Nov 06, 2016 10:44 pm

It is said that when we look at heteronuclear MO, the more electronegative atom has lower energy. As a result, it contributes more to the bonding energies. However, can someone explain why this is?

Manpreet Singh 1N
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Joined: Wed Sep 21, 2016 2:59 pm
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Re: Why do electronegative atoms have lower energy?

Postby Manpreet Singh 1N » Mon Nov 07, 2016 9:24 am

Hello,

The more electronegative atom has lower energy because the row of electronegativity relates to the charge of the nucleus. Therefore, the elements on the right (more charged nucleus) are more electronegative. That means that the more electronegative the atom is, the closer the electrons orbitals are to the nucleus. This is a lower energy because there is less separation between the positive and negative charges.

Hope that help :)


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