## determining electronegativity

Giovanni Anguiano-Gutierrez 3L
Posts: 52
Joined: Thu Jul 25, 2019 12:17 am

### determining electronegativity

How do you determine electronegativity?

Vincent Leong 2B
Posts: 207
Joined: Fri Aug 09, 2019 12:15 am

### Re: determining electronegativity

electronegativity is just the tendency for an atom to gain electrons. If you think of it logically, atoms on the further right side of the periodic table would want to get one electron in order to reach the most stable form (aka noble gas configuration)

chemboi
Posts: 101
Joined: Sat Jul 20, 2019 12:16 am

### Re: determining electronegativity

I don't think we have learned how to calculate actual values. We should know relative values, however.

Anne Tsai 1F
Posts: 50
Joined: Thu Jul 25, 2019 12:15 am

### Re: determining electronegativity

You would have to be given an electronegativity table to know the exact electronegativities of each atom, but generally you can follow the periodic trend (electronegativity increases across a row and decreases down a group).

Kaylee Clarke 1G
Posts: 103
Joined: Fri Aug 30, 2019 12:15 am

### Re: determining electronegativity

the periodic trend of electronegativity is increasing up and to the right of the PT

IreneGi2I
Posts: 93
Joined: Wed Sep 18, 2019 12:19 am

### Re: determining electronegativity

I don't think we would have to know how to calculate the actual electronegativity values. Since electronegativity is how strong an atom attracts electrons, you can memorize that fluorine has the strongest electronegativity on periodic table to find the general trend. F is located on the upper-right corner of the periodic table, it is easier to memorize that electronegativity increases from left to right and bottom to top!

Rohit Srinivas 2D
Posts: 101
Joined: Wed Sep 30, 2020 9:52 pm

### Re: determining electronegativity

This is outside of the scope of this class, but it was cool so I searched it up. There is a person named Linus Pauling who made a scale to measure electronegativity from 0.79-3.98 (1-4). He assigned Flourine to be 4, and then calculated the rest through experimental observation. This is known as the Pauling scale. It is measured in Pauling units.

705340227
Posts: 101
Joined: Wed Sep 30, 2020 10:08 pm

### Re: determining electronegativity

You can also look at how atoms' electrons behave in chemical bonds to determine the comparative electronegativity of the elements in the compound.

Sean Phen
Posts: 121
Joined: Wed Sep 30, 2020 10:01 pm

### Re: determining electronegativity

I do not know the way to determine electronegativity, but there is a periodic trend for electronegativity which indicates the increasing electronegativity.

Binyu You
Posts: 54
Joined: Wed Sep 30, 2020 9:37 pm

### Re: determining electronegativity

Based on what Dr. Lavelle said, I think it depends on both ionization energy and electron affinity. The higher the ionization energy and electron affinity is, the higher the electronegativity is, thus meaning more shared electrons are being pulled toward it. The lower the ionization energy and electron affinity is, the lower the electronegativity is, meaning electrons are pulled further away.

jessicasilverstein1F
Posts: 134
Joined: Wed Sep 30, 2020 9:57 pm

### Re: determining electronegativity

One thing that helps me is using the acronym FONClBrISCH from F being most electronegative in the periodic table

aashmi_agrawal_3d
Posts: 116
Joined: Wed Sep 30, 2020 9:39 pm

### Re: determining electronegativity

It increases to the right and decreases going down. You can also remember that fluorine is the most electronegative element to help you remember this trend.

Izamary Marquez 2H
Posts: 107
Joined: Wed Sep 30, 2020 9:44 pm

### Re: determining electronegativity

With this being said, the closer the elements are in electronegativity, the more affinity they have, correct? I remember Lavelle saying something about this but I can't remember the exact rule..

Alejandro Gonzalez 2G
Posts: 82
Joined: Wed Sep 30, 2020 10:04 pm

### Re: determining electronegativity

I don't think we've learned how to actually calculate electronegativity, just the trends in the periodic table (which for electronegativity, increases across a period and decreases down a group).

Caelin Brenninkmeijer 1G
Posts: 100
Joined: Wed Sep 30, 2020 9:50 pm

### Re: determining electronegativity

It also helps to use the periodic trends. Electronegativity is calculated using ionization energy and electron affinity, so if ionization energy and electron affinity are high, then the atom will also have a high electronegativity. You can figure out the ionization energy and electron affinity by using period trends- both increase up a group and across a period.

Diana Aguilar 3H
Posts: 120
Joined: Wed Sep 30, 2020 9:50 pm

### Re: determining electronegativity

I was also having trouble with determining electronegativity, thank you to everyone for the clarification, it really helped!

Namratha Gujje
Posts: 106
Joined: Wed Sep 30, 2020 9:33 pm

### Re: determining electronegativity

I don't think we need to know a way to calculate the electronegativity of an atom. We do need to know the electronegativity trend on the periodic table of elements. It also wouldn't hurt to know what the most electronegative elements are. They are fluorine, oxygen, and nitrogen. I like to remember them by the term FON.

Gustavo_Chavez_1K
Posts: 101
Joined: Wed Sep 30, 2020 9:46 pm

### Re: determining electronegativity

We can't necessarily determine an exact value for electronegativity, but what this class wants us to focus on is the period trend. So electronegativity increases when going up and to the right of the periodic table. This would make fluorine the most electronegative element on the table.

LovepreetSran_3H
Posts: 103
Joined: Wed Sep 30, 2020 9:33 pm

### Re: determining electronegativity

We're focusing more on the trend. Electronegativity increases as you move up and to the right on the periodic table.

505612629
Posts: 44
Joined: Wed Sep 30, 2020 9:43 pm

### Re: determining electronegativity

I believe we've learned the trends of electronegativity of elements on the periodic table. (those closer to reaching octet by gaining electrons on the right vs those on the left)

Mehreen 3I
Posts: 100
Joined: Wed Sep 30, 2020 9:36 pm

### Re: determining electronegativity

You will not need to know the specific calculations of electronegativity and if you do, they will be given to you. Just know the general trend of electronegativity and it is similar to ionization energy as mentioned in the lecture. The electronegativity of atoms increases as you move from left to right across a period in the periodic table.

Chinmayi Mutyala 3H
Posts: 105
Joined: Wed Sep 30, 2020 9:50 pm

### Re: determining electronegativity

Electronegativity increases as you go to the right and it decreases as you go down on the periodic table.

Brian_Wu_3B
Posts: 103
Joined: Wed Sep 30, 2020 9:41 pm

### Re: determining electronegativity

Top right corner (F) should be the most electronegative. As you move left or down, the electronegativity decreases

Mia Meza
Posts: 50
Joined: Wed Sep 30, 2020 9:55 pm

### Re: determining electronegativity

We haven't really learned how to calculate electronegativity but we do need to know the concept. What helps me is knowing that the left is more electronegative. The closer it is to F than I know it is more electronegative :)

LeahSWM 2E
Posts: 100
Joined: Wed Sep 30, 2020 9:47 pm

### Re: determining electronegativity

On the periodic table, electronegativity increases from bottom to top in groups, and increases from left to right across periods!

Dominic Benna 2E
Posts: 103
Joined: Wed Sep 30, 2020 10:09 pm

### Re: determining electronegativity

It increases as you go right across a period, and it decreases as you go down a group. So, Florine, for example, is the most electronegative atom.

Jeremy Wei 2C
Posts: 103
Joined: Wed Sep 30, 2020 9:59 pm

### Re: determining electronegativity

The trend in the periodic table is that electronegativity increases left to right in periods / top to bottom in groups!

Sondia Luong 1C
Posts: 102
Joined: Wed Sep 30, 2020 10:01 pm
Been upvoted: 1 time

### Re: determining electronegativity

If you ever have to calculate electronegativity, don't worry because the answer should already be given in the problem or on a periodic table! There are trends on the periodic table to determine levels of electronegativity. Electronegativity increases from left to right and decreases from top to bottom. It's useful to also know that fluorine has the highest electronegativity.

asalest 2K
Posts: 52
Joined: Wed Sep 30, 2020 9:39 pm

### Re: determining electronegativity

I just follow the periodic table trend. Electronegativity increases from left right and down up!

Susan Chamling 1F
Posts: 101
Joined: Wed Sep 30, 2020 9:42 pm

### Re: determining electronegativity

The general periodic trend for electronegativity is that it increases from left to right for periods and down to up for groups.

Rose_Malki_3G
Posts: 143
Joined: Wed Sep 30, 2020 10:02 pm

### Re: determining electronegativity

Electronegativity is essentially an atom's pull on electrons. The trend is that electronegativity increases as you go across a period and decreases as you go down a group

Muskaan Abdul-Sattar
Posts: 101
Joined: Wed Nov 13, 2019 12:19 am

### Re: determining electronegativity

I think you should just be aware of its trend, it increases as you move up and to the right of the periodic table.