Cations

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405404782 Gabriel Rigole 4F
Posts: 56
Joined: Sat Aug 17, 2019 12:18 am

Cations

Postby 405404782 Gabriel Rigole 4F » Sun Oct 27, 2019 2:20 pm

Why are cations smaller than their parent atoms?

Julianna Laurentano 4G
Posts: 52
Joined: Wed Sep 18, 2019 12:21 am

Re: Cations

Postby Julianna Laurentano 4G » Sun Oct 27, 2019 2:24 pm

Cations are smaller than their parent atoms because they have less electrons. Cations are positively charged ions, so when they lose their electrons, the remaining electrons move closer to the nucleus, and the size of the cation is reduced.

sbeall_1C
Posts: 109
Joined: Sat Sep 07, 2019 12:17 am
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Re: Cations

Postby sbeall_1C » Sun Oct 27, 2019 2:25 pm

Cations are smaller because these atoms have a positive charge on their central nucleus, which means that there are more protons than electrons. The positive charge pulls the electrons closer to the nucleus than if there were to be a neutral nucleus. This greater attraction leads to a smaller atomic radius.

Kimberly Koo 2I
Posts: 99
Joined: Sat Aug 17, 2019 12:17 am

Re: Cations

Postby Kimberly Koo 2I » Sun Oct 27, 2019 2:39 pm

Cations are smaller than their parent atoms because they are formed by a loss of electrons from the parent atom, while their nuclear charge stays the same. This makes the electrons stay closer to the nucleus, and therefore make the cation smaller than the parent atom.

Amy Kumar 1I
Posts: 114
Joined: Thu Jul 11, 2019 12:15 am

Re: Cations

Postby Amy Kumar 1I » Sun Oct 27, 2019 2:41 pm

Since there are fewer electrons but the same number of protons, the protons have a greater pull on the fewer number of electrons, therefore those electrons are drawn in closer to the nucleus, making the size of the cation smaller.

Rebekah Alfred 1J
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Re: Cations

Postby Rebekah Alfred 1J » Sun Oct 27, 2019 2:44 pm

On the other hand, anions are bigger than their parent atoms because (as indicated by their negative charge) they gained electrons.

105194078
Posts: 52
Joined: Thu Sep 19, 2019 12:17 am

Re: Cations

Postby 105194078 » Sun Oct 27, 2019 7:29 pm

405404782 Gabriel Rigole 4F wrote:Why are cations smaller than their parent atoms?


The way that my PLF told me to remember was that Cat-ions (paw-sitive) means that they're losing an electron (bc it's positive) and the Anion is like onion crying because it's gaining an electron. If it's losing an electron that means it's smaller than its parent whereas if it's gaining one then it's bigger.

gabbymaraziti
Posts: 111
Joined: Wed Sep 18, 2019 12:19 am

Re: Cations

Postby gabbymaraziti » Sun Oct 27, 2019 7:31 pm

Cations are smaller than their parents atoms because they have less electrons. Similarly, anions are larger than their parent atoms, because they have more electrons.

saigorijavolu2k
Posts: 108
Joined: Sat Sep 28, 2019 12:15 am

Re: Cations

Postby saigorijavolu2k » Sun Oct 27, 2019 7:38 pm

Cations lose an electron, which means that their atomic radius is smaller. They oftentimes resemble the element before that which are smaller.


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