sig figs and periodic tables

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Jared_Yuge
Posts: 100
Joined: Sat Aug 17, 2019 12:17 am

sig figs and periodic tables

Postby Jared_Yuge » Sun Oct 13, 2019 10:01 pm

which periodic table should I use in terms of to which decimal place cause a lot of them differ a lot.

Shimei_2F
Posts: 100
Joined: Fri Aug 09, 2019 12:17 am

Re: sig figs and periodic tables

Postby Shimei_2F » Sun Oct 13, 2019 10:03 pm

Use the periodic table Lavelle put on his website. It's the one that they gave us on the test.

zachary_nhem_4I
Posts: 57
Joined: Sat Aug 17, 2019 12:18 am

Re: sig figs and periodic tables

Postby zachary_nhem_4I » Sun Oct 13, 2019 10:07 pm

The IUPAC Periodic table is the one we used on the test and I believe it goes to three our four decimal places

RasikaObla_4I
Posts: 100
Joined: Thu Jul 25, 2019 12:15 am

Re: sig figs and periodic tables

Postby RasikaObla_4I » Sun Oct 13, 2019 10:23 pm

The periodic table given on the test was the one on his website, so I would use that one. I would also go to the last decimal place given on the periodic table and not round your final answer till the end.

J Medina 2I
Posts: 102
Joined: Wed Sep 25, 2019 12:17 am

Re: sig figs and periodic tables

Postby J Medina 2I » Sun Oct 13, 2019 10:39 pm

If we use the rounded version of the atomic mass (let's say to the hundredths) and correctly use significant figures, would our answer be wrong if the answer we get is right according to the rounded calculations we made?

Kendra Barreras 3E
Posts: 51
Joined: Mon Sep 23, 2019 12:16 am

Re: sig figs and periodic tables

Postby Kendra Barreras 3E » Sun Oct 13, 2019 10:41 pm

I dont think it should be as long as your final answer is not more sig figs than the least digit you used.

Sean Tran 2K
Posts: 65
Joined: Sat Aug 17, 2019 12:17 am

Re: sig figs and periodic tables

Postby Sean Tran 2K » Sun Oct 13, 2019 11:09 pm

When I use the periodic table for math on problems, I take the entire number shown on it, then round off my final answer to the required number of sig figs, in hopes of retaining accuracy.

Daniel Yu 1E
Posts: 100
Joined: Sat Aug 24, 2019 12:15 am

Re: sig figs and periodic tables

Postby Daniel Yu 1E » Sun Oct 13, 2019 11:29 pm

If you rounded your sig figs/ used a different periodic table and showed that through your work on a problem that you got incorrect because of rounding would you lose points?

Jacob Villar 2C
Posts: 105
Joined: Sat Aug 17, 2019 12:18 am

Re: sig figs and periodic tables

Postby Jacob Villar 2C » Sun Oct 13, 2019 11:34 pm

Should we bet using sig figs based on given number values (ex: if the problem gives us 250 mL, we use 3 sig figs) or should we be basing the amount of sig figs we use on calculations as we go?

DLee_1L
Posts: 103
Joined: Sat Aug 17, 2019 12:17 am

Re: sig figs and periodic tables

Postby DLee_1L » Fri Oct 18, 2019 12:00 pm

You should base your sig figs off of what the problem gives you I think. If 250 ml is your smallest given, your final answer should have 2 sig figs. I don't think constants like 273.15 K contribute to sig figs, but you might want to check that.

ranqiao1e
Posts: 51
Joined: Sat Sep 14, 2019 12:15 am

Re: sig figs and periodic tables

Postby ranqiao1e » Fri Oct 18, 2019 1:07 pm

You should use the one Professor Lavelle gives us on his website. On the test, I usually keep as many sig figs as I can when I'm doing calculations to keep my answers as precise as possible.

AprilPaz
Posts: 51
Joined: Wed Sep 18, 2019 12:18 am

Re: sig figs and periodic tables

Postby AprilPaz » Fri Oct 18, 2019 2:55 pm

The periodic table Prof. Lavelle provided is good.


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