## Formula for Difference

Brandon Tao 1K
Posts: 100
Joined: Sat Aug 17, 2019 12:15 am

### Formula for Difference

Do we ever need to know or use the equation for the difference in electronegativity in two elements?

Sidharth D 1E
Posts: 98
Joined: Sat Aug 24, 2019 12:17 am

### Re: Formula for Difference

I dont think need to know anything other than trends for electronegativity

Ashley Fang 2G
Posts: 102
Joined: Fri Aug 30, 2019 12:17 am

### Re: Formula for Difference

If anything, the electronegativity values will be given if on a test.
The trends are increasing as you go up a column and also to the right across a period.

Marty Hockey
Posts: 47
Joined: Wed Sep 18, 2019 12:19 am

### Re: Formula for Difference

You should know the various trends and understand the exceptions (the column of oxygen) but you do not need to know the electronegativity values of each element.

005162902
Posts: 102
Joined: Wed Sep 18, 2019 12:15 am

### Re: Formula for Difference

I dont believe we ever calculate electronegativity. We only need to know and understand the electronegativity trends on the periodic table (it increases as you go up and to the right on the table).

Sofia Q
Posts: 49
Joined: Sat Aug 17, 2019 12:15 am

### Re: Formula for Difference

At most you will be given the differences and you will have to subtract those, but I doubt we personally have to find the electronegativity.

Lara Kristine Bacasen 1L
Posts: 110
Joined: Sat Jul 20, 2019 12:16 am
Been upvoted: 1 time

### Re: Formula for Difference

He said we didn't need to. We should know the general trends like how bond is most likely ionic if the difference in electronegativity between the two is greater than 2. For covalent, less than 1.5 I believe. Just remember that depending on the bonded pair the bond can be more covalent or ionic. I suggest reading up on that in section 2D.

kendal mccarthy
Posts: 109
Joined: Wed Nov 14, 2018 12:22 am

### Re: Formula for Difference

I think the majority of what we will have to know are the basic trends. They also might give us numbers though if there are certain elements that don't stick to the status quo.