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How do I calculate the % ionic character of the I-F bond? I know the formula given in the lectures, but I cant get an answer...seems dumb, but the reason is that I dont know what to do with my calculator when it comes to the "EXP" in the formula. I use a Casio fx-82MS. Can anybody help? Thanks!

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I have fx-300 MS but I guess it is the same. Let's say you want to write "2.37X10^5", so what you do is plug in 2.37EXP5. That's it.
No, exp(something) means e^(something). e being euler's number, which is approximately 2.71828. Or you can just press e on your calculator, most scientific calculators have the e button. It's not the same as the "ee" button, which is the other e (italicized). Italicized e means you do *10^(something)
No, that is "e" you are talking about. This one is EXP on casio calculators. It has nothing to do with "e". Because we have "e" as another button on the calculators.

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Oh, I mean in the Pauling formula, the exp(-(Xa-Xb)^2/4) is e^ or 2.71828^(-(Xa-Xb)^2/4)
OK. I thought the question was about the button configuration.
Oh, and by the way 2.37X10^5 is just a number that I made up if it is not clear.
Thanks guys. I got the right answer on the problem by using the button e^x, but still didnt quite understood the exp button. I have just tried 10exp2 and it gave me 1000, 1exp2 is 100. But thanks.
EXP means 10^n . whatever you type after EXP is going to be the exponent of 10. look at my first reply. I was trying to explain it. I use Casio too. so, 10exp2= 10.10^2 and it will give you 1000 for sure.
I see. Now I understood what you meant.

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