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### De Brogiles wavelength

Posted: Mon Apr 30, 2018 4:06 pm
What is the wavelength of a neon atom traveling with a velocity of 4.34 X 10^3 m/s?

There was a similar question to this on test 2 but I wasn't sure how to do the problem would I convert the moles to atoms then convert grams to kilograms and once I got that it will give me the mass and finally use λ=h/mv in order to find the wavelength is that correct or am I missing something?

### Re: De Brogiles wavelength

Posted: Mon Apr 30, 2018 4:14 pm
Yes, I think you would have to use the molar mass and convert that to kg per unit(or atom). I don't know how else a person would be able to get the mass in order to plug it into the equation λ=h/mv.

### Re: De Brogiles wavelength

Posted: Mon Apr 30, 2018 4:33 pm
In addition to Sara's answer and pls correct me if I'm wrong:), since it's one atom of neon, the molar mass has to be converted using Avogadro's constant.

### Re: De Brogiles wavelength

Posted: Mon Apr 30, 2018 4:44 pm
I think the problem here is the method of getting the mass of the element to solve for the wavelength. De Broglie's equation would definitely solve for this by using lamda=h/mv. really hope this helps :)

### Re: De Brogiles wavelength

Posted: Sun May 06, 2018 11:16 pm
You would use lambda= h/mv but would have to find the mass of the neon atom and plug that value into the equation.