Atomic radius when changing sub- shells

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Melody Haratian 2J
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Atomic radius when changing sub- shells

Postby Melody Haratian 2J » Sat Nov 07, 2020 2:42 pm

Does the atomic radius increase when you go from 2s to 2p?

Joseph Hsing 2C
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Re: Atomic radius when changing sub- shells

Postby Joseph Hsing 2C » Sat Nov 07, 2020 2:49 pm

Yup, atomic radius increases due to the extra shell of electrons.

Quinton Sprague 1A
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Re: Atomic radius when changing sub- shells

Postby Quinton Sprague 1A » Sat Nov 07, 2020 2:59 pm

I believe the atomic radius actually decreases across a period. Since the effective nuclear charge increases across a period, there is a greater nuclear attraction to the electrons across a period, subsequently pulling the electron cloud closer in and lowering the atomic radius. Hence, a transition from 2s to 2p I believe would actually result in a smaller atomic radius.

Eliana Witham 2H
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Re: Atomic radius when changing sub- shells

Postby Eliana Witham 2H » Sat Nov 07, 2020 3:29 pm

No, the atomic radius gets smaller which the last post explains. The exception, however, is that the radius increases from the nitrogen atom to the oxygen atom because of the extra electron-electron repulsion. Oxygen has 2 electrons in one orbital, whereas nitrogen does not.

AndrewNguyen_2H
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Re: Atomic radius when changing sub- shells

Postby AndrewNguyen_2H » Sat Nov 07, 2020 3:31 pm

It depends. If you're talking about trends, the atomic radius does decrease when you go from left to right across the periodic table. If you are talking about a specific atom, then going from 2s to 2p will increase the radius because 2p is slightly higher in energy than 2s in multielectron atoms.


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