Atom size

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Bao Tram Nguyen
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Joined: Sat Aug 24, 2019 12:17 am

Atom size

Postby Bao Tram Nguyen » Sun Nov 10, 2019 9:54 pm

What happens to the size of an atom as the electronegativity increases and decreases? Does it actually effect atom size?

Rachel Yu 1G
Posts: 113
Joined: Fri Aug 09, 2019 12:15 am

Re: Atom size

Postby Rachel Yu 1G » Sun Nov 10, 2019 9:57 pm

I believe it's the other way around, in which atom size affects electronegativity. Atom size decreases across a period because the atomic number of an atom increases, meaning the positive charge of the nucleus pulls in electrons more strongly, leading to a stronger electronegativity. Overall, smaller atomic size means electrons are closer to the nucleus and pulled more strongly, leading to larger electronegativity.

Maya Serota 3G
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Joined: Tue Sep 24, 2019 12:17 am

Re: Atom size

Postby Maya Serota 3G » Sun Nov 10, 2019 9:58 pm

As you go up a group and across a period to the right, electronegativity increases. If you go down a group and to the left on the periodic table, atom size increases.

AndreiRekesh1I
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Joined: Fri Aug 30, 2019 12:15 am

Re: Atom size

Postby AndreiRekesh1I » Sun Nov 10, 2019 9:59 pm

They're not directly correlated but as electronegativity increases across the periodic table so do the number of protons in the nucleus so atom size goes down, as the protons attract the electrons more tightly. As we go down the periodic table, electronegativity decreases because electrons are further away from the pull of the nucleus and atomic radius goes up.

Snigdha Uppu 1G
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Joined: Sat Sep 07, 2019 12:15 am

Re: Atom size

Postby Snigdha Uppu 1G » Sun Nov 10, 2019 10:56 pm

Atomic radius increases in the opposite direction from electronegativity.

preyasikumar_2L
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Joined: Fri Aug 09, 2019 12:17 am

Re: Atom size

Postby preyasikumar_2L » Sun Nov 10, 2019 11:08 pm

Electronegativity is affected by the size of the atom, not the other way around. In fact, they're somewhat inversely proportional - as atom size increases, electronegativity decreases because it is easier for smaller atoms to attract electrons since the nucleus would be much closer to the electron cloud. Also, electronegativity trends and atomic size trends are opposite. Electronegativity increases up a group and left to right on a period, while atomic size increases down a group and right to left on a period.

Lauren Lewis3L
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Joined: Wed Feb 20, 2019 12:16 am

Re: Atom size

Postby Lauren Lewis3L » Sun Nov 10, 2019 11:16 pm

Atomic radii is the opposite of electronegativity. When you move down a group the atomic radii increases and when you move from right to left the radii increases as well.

Eesha Sohail 1D
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Joined: Sat Aug 17, 2019 12:16 am

Re: Atom size

Postby Eesha Sohail 1D » Sun Nov 10, 2019 11:16 pm

Since the oxygen atom is actually smaller than the nitrogen, would it be less electronegative than the latter? Meaning, do these two not follow the "general" trend?

Bilal Pandit 1J
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Joined: Wed Sep 11, 2019 12:16 am

Re: Atom size

Postby Bilal Pandit 1J » Sun Nov 10, 2019 11:17 pm

Its essentially all determined by how close the electrons are to the actual nucleus.

Matthew ILG 1L
Posts: 112
Joined: Sat Aug 17, 2019 12:15 am

Re: Atom size

Postby Matthew ILG 1L » Sun Nov 10, 2019 11:21 pm

I don't believe that electronegativity and atomic radius are directly related. However, their trends are opposite, with the atomic radius increasing down and to the left and the electronegativity increasing up and to the right. It is a case of correlation without causation I believe.

Noah Canio 3C
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Joined: Wed Sep 18, 2019 12:20 am

Re: Atom size

Postby Noah Canio 3C » Mon Nov 11, 2019 12:37 am

Typically electronegativity has the "opposite" trend in comparison to that of atomic radius. This is because the trend in the periodic table for electronegativity is increasing from left to right and bottom to top. In contrast, atomic radius increases from right to left and from top to bottom. These traits have contrasting trends since atomic radius increases as each atom has access to higher quantum numbers (n) while electronegativity changes based on effective nuclear charge, as moving right in the periodic table means that elements have higher numbers of protons, which, in turn, makes those atoms more likely to hold on to electrons in a given bonding pair.

Mitchell Koss 4G
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Re: Atom size

Postby Mitchell Koss 4G » Tue Nov 12, 2019 10:23 am

However, being electronegative does not make an atom small, it is being small that would impact electronegativity

Juana Abana 1G
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Joined: Wed Sep 18, 2019 12:15 am

Re: Atom size

Postby Juana Abana 1G » Thu Nov 14, 2019 6:26 pm

Atomic radius increases as you move down a group as well as when you move from right to left on a period. It is basically the opposite of electronegativity.

kevinolvera1j
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Joined: Fri Aug 02, 2019 12:15 am

Re: Atom size

Postby kevinolvera1j » Sun Nov 17, 2019 10:29 pm

On the periodic table, the further you go down and to the left, the larger the size of the atom. In terms of periods, size decreases from left to right. In terms of groups, size increases as you go down.

PriscillaLi_3G
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Joined: Fri Sep 27, 2019 12:30 am

Re: Atom size

Postby PriscillaLi_3G » Mon Dec 02, 2019 4:25 pm

Electronegativity does not affect the size of an atom.

Mallika Chimpiri 3K
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Joined: Thu Jul 25, 2019 12:17 am

Re: Atom size

Postby Mallika Chimpiri 3K » Mon Dec 02, 2019 4:33 pm

Electronegativity and atomic size have opposite trends.

Kaitlynn Tran 3F
Posts: 54
Joined: Wed Sep 18, 2019 12:20 am

Re: Atom size

Postby Kaitlynn Tran 3F » Thu Dec 05, 2019 11:10 pm

As atoms get larger, they become less electronegative because the electron cloud gets farther away from the nucleus.

t_rasul3I
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Joined: Wed Sep 30, 2020 9:38 pm

Re: Atom size

Postby t_rasul3I » Sun Nov 08, 2020 12:54 am

Electronegativity does not directly affect atom size but there is correlation. Typically cations are smaller and they have less electronegativity and anions are larger and they have less electronegativity. Anions are smaller because they have more e- (more electronegativity) and so they have a larger atomic radii.

Joel Meza 2E
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Joined: Wed Sep 30, 2020 9:56 pm

Re: Atom size

Postby Joel Meza 2E » Sun Nov 08, 2020 2:12 pm

As you go up a group and also across a period to the right on the periodic table, the electronegativity increases. Now, if you go down a group and towards the left on the periodic table, the size of the atom increases.

Kyle Dizon 1A
Posts: 46
Joined: Mon Oct 05, 2020 12:16 am

Re: Atom size

Postby Kyle Dizon 1A » Sun Nov 08, 2020 2:19 pm

I do not think that the size of an atom is influenced by the electronegativity that it contains, but we do see that it is somewhat the opposite of each other because the periodic table shows a trend that electronegativity gradually increases when going left to right/bottom to top of the table. On the other hand, the trend of the radius is the opposite.

Karen Elrayes 1L
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Joined: Wed Sep 30, 2020 9:45 pm

Re: Atom size

Postby Karen Elrayes 1L » Sun Nov 08, 2020 2:22 pm

"Electronegativity is the tendency of the atoms of an element to attract electrons when they are chemically combined with another element." So electronegativity deals with electrons from other atoms and not itself which is why it doesn't affect atom size. But as the rest of the posts said it is the opposite trend to atomic radius.

Adalia 3E
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Been upvoted: 2 times

Re: Atom size

Postby Adalia 3E » Sun Nov 08, 2020 2:24 pm

Electronegativity does not cause changes in atomic size, nor does atomic size cause changes in electronegativity, but they have similar trends because they were both affected by the attractive forces between the electrons and nucleus.

Mingzi Yang 1H
Posts: 40
Joined: Wed Sep 30, 2020 9:53 pm

Re: Atom size

Postby Mingzi Yang 1H » Sun Nov 08, 2020 8:29 pm

I don't think the atomic size of an element is directly affected by its electronegativity. In terms of their trends in the periodic table, they have opposite trends.


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