## Rules for Significant Figures

Katherine Chhen 3I
Posts: 53
Joined: Fri Sep 28, 2018 12:15 am

### Rules for Significant Figures

Can someone explain the rules regarding significant figures?

AniP_2D
Posts: 95
Joined: Sat Aug 17, 2019 12:17 am

### Re: Rules for Significant Figures

There are a few rules that one must take into consideration when dealing with significant figures.
1. Any number that is not zero is considered significant.
2. Zeros are only considered significant if they are between two significant figures (any non-zero number).
3. Also, zeros that are placed after a decimal are significant when they come after a non-zero number, not before.
4. If a zero comes after a non-zero, it is significant only if it is followed by a decimal point.

Examples: 0.0670 has 3 sig figs
670 has 2 sig figs
670. has 3 sig figs
Hope this helped!

KeyaV1C
Posts: 103
Joined: Sat Aug 17, 2019 12:17 am
Been upvoted: 1 time

### Re: Rules for Significant Figures

On the Chem 14A class website there’s a link that has everything in detail you need to know about sig figs:
https://lavelle.chem.ucla.edu/wp-conten ... OUT_SF.pdf

405404782 Gabriel Rigole 4F
Posts: 56
Joined: Sat Aug 17, 2019 12:18 am

### Re: Rules for Significant Figures

Thank you for the refresher on Sig Figs

emwoodc
Posts: 45
Joined: Fri Aug 09, 2019 12:16 am

### Re: Rules for Significant Figures

Most of them are mentioned but the one that gets me the most is the rule where if there is a decimal point the zeros after it always counts