## Calculated vs Observed Value

KNguyen_1I
Posts: 101
Joined: Sat Aug 17, 2019 12:16 am

### Calculated vs Observed Value

In lecture, Professor Lavelle said that as opposed to other values regarding periodic trends, electronegativity is a calculated value as opposed to an observed value. What does this mean?

Paige Lee 1A
Posts: 136
Joined: Sat Sep 07, 2019 12:16 am

### Re: Calculated vs Observed Value

I think he means that the calculations you do based on the periodic table may differ from observed results in an actual experiment in real life

Jordan Young 2J
Posts: 102
Joined: Thu Jul 25, 2019 12:17 am
Been upvoted: 1 time

### Re: Calculated vs Observed Value

I think it means that electronegativity is value that is calculated through a formula based on other values, whereas other values such as IE, electron affinity, and atomic radius are already found and don't require a formula for calculation.

Rory Simpson 2F
Posts: 106
Joined: Fri Aug 09, 2019 12:17 am

### Re: Calculated vs Observed Value

Electronegativity is a value that is calculated from an formula. In the textbook section 2D.1, it mentions that the values were first calculated with an expression that determines the differences in electronegativity between bonds by using dissociation energies of that bond. All of the other periodic trends are actual values that are can be experimentally observed, while electronegativity is a calculated measure of the electron attraction ability.

Pipiena Malafu 3J
Posts: 39
Joined: Fri Sep 28, 2018 12:27 am

### Re: Calculated vs Observed Value

In quick summary, in comparison to other periodic patterns, electronegativity is able to be calculated as elements have set electronegative charges.

Matt F
Posts: 100
Joined: Sat Aug 17, 2019 12:17 am

### Re: Calculated vs Observed Value

I know we haven't covered it yet, but will we eventually need to know how to calculate electronegativity for a specific element? Or will we just need to know the trend for the table

DLee_1L
Posts: 103
Joined: Sat Aug 17, 2019 12:17 am

### Re: Calculated vs Observed Value

We might be asked to in order to determine the type of bond, but for now, we only need to know the trend.