## sig figs in electronic transition problem

Beata_Vayngortin_3L
Posts: 21
Joined: Fri Jul 22, 2016 3:00 am
Been upvoted: 1 time

### sig figs in electronic transition problem

If you are given a problem that tells you that an atom went through an electronic transition from two energy levels (for example n=3 to n=1 like in the practice quiz) but you are not given any more numerical information, how many sig figs do you use in your answer? is it one sig fig because the energy level has one sig fig or do you base your sig figs off of Planck's and Rydberg's constant?

Jazmin 2C
Posts: 4
Joined: Wed Sep 21, 2016 2:58 pm

### Re: sig figs in electronic transition problem

Yes same question here! I'm thinking three sig. figs. is standard, but I'm not totally sure.

derek1d
Posts: 19
Joined: Wed Jun 28, 2017 3:00 am

### Re: sig figs in electronic transition problem

Same question, I get confused on which to pay attention to when putting significant figures in the final answer. From my understanding though, the significant figures you begin with is what should be present in your final answer. Again, I could be misunderstood. Does someone mind clarifying this?

Timothy Kao 1B
Posts: 28
Joined: Fri Jun 23, 2017 11:39 am

### Re: sig figs in electronic transition problem

I also have the same question. Would we just have 2 dog figs in the decimals?

805070989
Posts: 18
Joined: Fri Jun 23, 2017 11:39 am

### Re: sig figs in electronic transition problem

I have the same question and will we get points off if we are off on sig figs or round?

Chem_Mod
Posts: 17990
Joined: Thu Aug 04, 2011 1:53 pm
Has upvoted: 418 times

### Re: sig figs in electronic transition problem

Beata_Vayngortin_3L wrote:If you are given a problem that tells you that an atom went through an electronic transition from two energy levels (for example n=3 to n=1 like in the practice quiz) but you are not given any more numerical information, how many sig figs do you use in your answer? is it one sig fig because the energy level has one sig fig or do you base your sig figs off of Planck's and Rydberg's constant?

In this example sig fig are determined by the measured values of the constants.

Exact numbers such as n = 1, 2, do not play a role in sig fig.
If you multiply something by 4 in a calculation the answer does not have one sig fig ...