November 30, 2022, 12:45:36 PM
Forum Rules: Read This Before Posting

### Topic: Order of magnitude  (Read 6270 times)

0 Members and 1 Guest are viewing this topic.

• Guest
##### Order of magnitude
« on: April 19, 2004, 10:17:19 AM »
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.

#### Mitch

• General Chemist
• Sr. Member
• Posts: 5298
• Mole Snacks: +376/-3
• Gender:
• "I bring you peace." -Mr. Burns
##### Re:Order of magnitude
« Reply #1 on: April 19, 2004, 01:04:37 PM »
10 is an order of magnitude above 1. 100 is an order of magnitude above 10.
Most Common Suggestions I Make on the Forums.
1. Start by writing a balanced chemical equation.
2. Don't confuse thermodynamic stability with chemical reactivity.
3. Forum Supports LaTex

#### gregpawin

• Chemist
• Full Member
• Posts: 245
• Mole Snacks: +22/-5
• Gender:
• Ebichu chu chu chuses you!
##### Re:Order of magnitude
« Reply #2 on: April 19, 2004, 04:00:27 PM »
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.
« Last Edit: April 19, 2004, 04:01:36 PM by gregpawin »
I've got nothin'