## Significant Figures

H-Atom ($E_{n}=-\frac{hR}{n^{2}}$)

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Angela_Kim_1N
Posts: 21
Joined: Fri Jul 22, 2016 3:00 am

### Significant Figures

What is the wavelength of the radiation emitted when an electron transitions from n = 4 to n=3?
I understand how to solve this question, however how many significant figures should the answer be?

Hirmand_Sarafian_2N
Posts: 24
Joined: Wed Sep 21, 2016 2:56 pm

### Re: Significant Figures

You use the amount of significant figures in the constant you used, so you just use whatever amount of sig figs that the rydberg constant has on our chart of values.

nikita bhat 2D
Posts: 29
Joined: Wed Sep 21, 2016 2:59 pm

### Re: Significant Figures

Because the Rydberg constant has 6 significant figures given, this is how many the answer should have as well.

Jasmine Cha 1A
Posts: 22
Joined: Wed Sep 21, 2016 2:59 pm

### Re: Significant Figures

Wait, but when we use significant figures, we are supposed to take that of the number with the least significant figures, so shouldn't it just be one significant figure adapted from the n=3? Or does that just not count?

Scott_Anderson_3J
Posts: 11
Joined: Wed Sep 21, 2016 2:56 pm

### Re: Significant Figures

Jasmine Cha 1J wrote:Wait, but when we use significant figures, we are supposed to take that of the number with the least significant figures, so shouldn't it just be one significant figure adapted from the n=3? Or does that just not count?

No, that doesn't count because the 3 isn't actually being used in the calculation. The constant is being used, therefore there are six significant figures.

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