Chemical Forums
Chemistry Forums for Students => Undergraduate General Chemistry Forum => Topic started by: Username on April 19, 2004, 10:17:19 AM
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Can you guys explain the expression "order of magnitude" to me?
A book I'm reading says: "The angstrom is a convenient unit because the lighter atoms are on the order of magnitude of 1 A."
I know it has something to do with rough estimations since the book also says that for example a number between 3 and 30 is on the order of magnitude of 10.
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10 is an order of magnitude above 1. 100 is an order of magnitude above 10.
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In other words, if express numbers in scientific notation: 2.22 X 103, the exponential number is the magnitude. If you're comparing something and its not quite one base number higher, then you call it a factor of X higher... 6 is higher than 3 by a factor of 2, but 60 is higher than 6 by one order of magnitude.
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Hehe OK I think I finally got it.
It usually takes a while for me to understand the simple things...let's me look kinda dumb from time to time ::)
Edit:
Thanks for the explanations.