## positive and negative ion

505612629
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### positive and negative ion

Is the radius of the element larger or smaller when it has a positive or negative ion?

Savana Maxfield 3F
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### Re: positive and negative ion

A negative ion has a larger radius than the original element, while a positive ion has a smaller atomic radius.

Algernon Jackson 2l
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### Re: positive and negative ion

The radius of the element is larger when the ion is negatively charged.

305572629
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Joined: Wed Sep 30, 2020 9:41 pm

### Re: positive and negative ion

The above statements are true, but remember to look at the element's location on the periodic table because as you go closer and closer to the bottom left corner, the radius gets bigger, then you must remember to consider whether or not it is an ion (positive or negative).

LaurenChoi_1J
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### Re: positive and negative ion

I believe negative ions have a higher atomic radius because they have more electrons, but someone please correct me if I am wrong!

Lillian
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### Re: positive and negative ion

The negative ion would have a larger radius because in this case, the nuclear charge stays the same (if they're the same element). The only thing that would be changing is the number of electrons, meaning the radius would be bigger.

Ellison Gonzales 1H
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### Re: positive and negative ion

Lillian wrote:The negative ion would have a larger radius because in this case, the nuclear charge stays the same (if they're the same element). The only thing that would be changing is the number of electrons, meaning the radius would be bigger.

I understand the size of the radius correlating with whether it is an anion or cation, but what do you mean about the nuclear charge staying the same? I don’t fully understand that concept/statement

Ellison Gonzales 1H
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Joined: Wed Sep 30, 2020 10:00 pm

### Re: positive and negative ion

The reason the radius of an element is larger when the ion is negative is because there is an additional e- going to the outer shell that causes more e- repulsion, therefore making anions much bigger than their neutral atom.

Griffin G
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### Re: positive and negative ion

Anions have a larger atomic radius than cations, because the added electron decreases the net charge of the nucleus, i believe.

Anthony_Sandoval_1D
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### Re: positive and negative ion

Negatively charged ion have a larger radius than positively charged ions.

Lillian
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Joined: Wed Sep 30, 2020 9:48 pm

### Re: positive and negative ion

Ellison Gonzales 3F wrote:
Lillian wrote:The negative ion would have a larger radius because in this case, the nuclear charge stays the same (if they're the same element). The only thing that would be changing is the number of electrons, meaning the radius would be bigger.

I understand the size of the radius correlating with whether it is an anion or cation, but what do you mean about the nuclear charge staying the same? I don’t fully understand that concept/statement

By nuclear charge staying the same, I meant that the number of protons stays the same. Since the number of protons do not change, the charge of the nucleus remains.

Heidi Buri 2I
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Joined: Wed Sep 30, 2020 9:57 pm

### Re: positive and negative ion

Hi! I believe that the radius of an element is smaller when the ion is positive. When the ion is negative, the radius of the element is larger.

Katie Nye 2F
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### Re: positive and negative ion

Negative ions are larger than the positive or neutral counterparts.

Shalyn Kelly 3H
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### Re: positive and negative ion

Hi! As stated in all of the above posts, an element with a negatively charged ion has a larger radius than one that's positively charged. There are also the periodic table trends you can use for quick reference.

Sejal Parsi 3K
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Joined: Wed Sep 30, 2020 10:03 pm

### Re: positive and negative ion

Hi! An element with a negatively charged ion will have a larger radius because it has additional electrons than one that's positively charged. It's good to check the periodic table and follow trends if it is not for the same element though.