Electronegativity

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melissa_dis4K
Posts: 106
Joined: Fri Sep 28, 2018 12:28 am

Electronegativity

Postby melissa_dis4K » Wed Dec 05, 2018 12:49 pm

Between atoms like chloride and oxygen how do you determine which has a higher electronegativity given that electronegativity increases as you go up and across to the right?

Kayla Vo 1B
Posts: 60
Joined: Fri Sep 28, 2018 12:26 am

Re: Electronegativity

Postby Kayla Vo 1B » Wed Dec 05, 2018 1:57 pm

Going down a group has more impact on the electronegativity of an atom than going across a period. As you go down a group, there will be another valence shell added. This means that the outermost electrons feel less pull from the positive nuclear charge. Because of this, chlorine is less electronegative compared to oxygen.

sarahwu3a
Posts: 50
Joined: Sat Aug 17, 2019 12:17 am

Re: Electronegativity

Postby sarahwu3a » Fri Oct 25, 2019 10:29 am

Oxygen is more electronegative as Chlorine is down a period so it has less pull on the outer shell of electrons.

Rohan Kubba Dis 4B
Posts: 50
Joined: Sat Aug 17, 2019 12:18 am

Re: Electronegativity

Postby Rohan Kubba Dis 4B » Sun Oct 27, 2019 4:50 pm

A good rule of thumb when dealing with electronegativity is that as you are going across a period, generally, that has more impact than variance within a group. In other words, that electronegativity is usually closer across a period. With that in mind, even though Chlorine is in the same group as fluorine( the most electronegative atom), oxygen is in the same period, making it more electronegative.

Maika Ngoie 3E
Posts: 53
Joined: Fri Aug 02, 2019 12:16 am

Re: Electronegativity

Postby Maika Ngoie 3E » Sun Oct 27, 2019 5:48 pm

While we generally view the trend (up and across to the right) as equally important, the truth is that going up has a bit of a greater effect on electronegativty than moving across a period. This is because the higher groups have less shells and therefore feel more pull from other atoms.

Nathan Rothschild_3D
Posts: 67
Joined: Fri Aug 02, 2019 12:15 am

Re: Electronegativity

Postby Nathan Rothschild_3D » Sun Oct 27, 2019 7:45 pm

Another way to look at this is by using the radius of an atom or element. The electronegativity is inversely related to radius, so since oxygen has a smaller radius, its electron negativity is higher!!

005321227
Posts: 63
Joined: Sat Sep 07, 2019 12:15 am

Re: Electronegativity

Postby 005321227 » Sun Oct 27, 2019 11:18 pm

since oxygen has a smaller radius, its electronegativity is higher!


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