## sig figs and periodic tables

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

### sig figs and periodic tables

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
Been upvoted: 1 time

### Re: sig figs and periodic tables

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

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

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

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

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

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

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

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

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

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

The periodic table Prof. Lavelle provided is good.