sig figs in periodic table

Moderators: Chem_Mod, Chem_Admin

Lauren Solouki 4E
Posts: 9
Joined: Fri Sep 28, 2018 12:28 am

sig figs in periodic table

Postby Lauren Solouki 4E » Tue Oct 09, 2018 7:28 pm

If the number of sig figs in the provided periodic table are less than that in the question, should our final answer have the least amount of sig figs in the periodic table or in the question?

Lumbini Chandrasekera 1B
Posts: 63
Joined: Fri Sep 28, 2018 12:18 am

Re: sig figs in periodic table

Postby Lumbini Chandrasekera 1B » Tue Oct 09, 2018 7:49 pm

The sig figs should be based on the given values in the question, not in the periodic table. So even though there are more sig figs in the values provided in the question, you would still use that instead.

Moryel Yashar 1J
Posts: 31
Joined: Fri Sep 28, 2018 12:15 am

Re: sig figs in periodic table

Postby Moryel Yashar 1J » Thu Oct 11, 2018 9:32 pm

The amount of significant figures in your final answer should be based on the significant figures given in the problem, not the periodic table. However, you would only use the least number of significant figures when using multiplication and/or division to solve the problem. For problems solved through addition and/or subtraction, use the least number of decimal places.

Vicky Lu 1L
Posts: 60
Joined: Fri Sep 28, 2018 12:18 am

Re: sig figs in periodic table

Postby Vicky Lu 1L » Thu Oct 11, 2018 9:57 pm

It is best to use the all the significant figures from the periodic table as well as solving your way through a problem with multiplication, division, addition, etc. This way the calculation will be as exact as possible for the final answer. Only by the very end do you round the answers according to the given value with the least significant figures.

KatelinTanjuaquio 1L
Posts: 69
Joined: Fri Sep 28, 2018 12:16 am
Been upvoted: 1 time

Re: sig figs in periodic table

Postby KatelinTanjuaquio 1L » Thu Oct 11, 2018 11:39 pm

I think it is best to use the number of sig figs found in the question. However, when performing the calculations, you should be as exact as possible and use however many figures given on the periodic table. Then, put your answer in sig figs that match the answer.

MadisonB
Posts: 63
Joined: Fri Sep 28, 2018 12:19 am

Re: sig figs in periodic table

Postby MadisonB » Thu Oct 11, 2018 11:55 pm

You always look to the least amount of sig figs in any problem. It makes practical sense because the least number of sig figs determines how precise you can be in your calculations.

g orloff 1J
Posts: 45
Joined: Fri Sep 28, 2018 12:16 am

Re: sig figs in periodic table

Postby g orloff 1J » Thu Oct 11, 2018 11:56 pm

It is best to follow sig fig rules based on what is given to you in the question


Return to “Significant Figures”

Who is online

Users browsing this forum: No registered users and 1 guest