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electron mass

Posted: Mon Apr 16, 2018 1:37 am
by Kailie_Giebink_1E
do electrons ever possess enough mass to make a difference

Re: electron mass

Posted: Mon Apr 16, 2018 12:55 pm
by Chem_Mod
It depends on what you are talking about. The value is important in knowing for fields which study electronic transport etc.

Re: electron mass

Posted: Wed Apr 18, 2018 1:11 pm
by Isabella Barkett 1G
Electrons have a mass but in comparison to protons and neutrons in an atom, they will not affect the total mass I think.

Re: electron mass

Posted: Wed Apr 18, 2018 2:10 pm
by ZachMoore1C
It is a constant weight of 9.1095x10^-31 kg

Re: electron mass

Posted: Wed Apr 18, 2018 8:58 pm
by Komal Prakash 1H
The small mass of an electron is significant as it allows us to observe the wavelike properties of an electron even when it is traveling at high speeds (even as the speed gets closer to the speed of light, the mass is so small that the wavelength=(h/(mass X velocity)) is observable.

Re: electron mass

Posted: Sat Apr 21, 2018 12:17 pm
by Myles Chang 1B
It will make a difference on the test. I would guess at least a few of the calculations on the test will involve finding properties of an electron based on its momentum, which you need mass to find.

Re: electron mass

Posted: Sun Apr 22, 2018 4:44 pm
by Jack Dias
Yes, its mass will be important to know for the test. It may be given to us but I wouldn't rely on that. The mass isn't considered for stuff like the atomic mass, as only protons and neutrons are considered due to their much greater mass, but for our upcoming case it is imperative to consider the electron's mass.

Best,
Jack Dias

Re: electron mass

Posted: Sun Apr 22, 2018 5:32 pm
by yazminedesan1F
yes it's important to consider it

Re: electron mass

Posted: Sun Apr 22, 2018 8:17 pm
by Vienna Cimetta 1L
also i'm pretty sure they said the mass will be given on the front page of the test, so don't worry about memorizing it

Re: electron mass

Posted: Sun Apr 22, 2018 8:44 pm
by Isabelle De Rego 1A
Yes, watch out for calculating the kinetic energy (1/2mv^2) of an electron, in which you will need the mass of an electron. Also, if you need to calculate the wavelength of an electron, you would use de Broglie's equation, not c=h*lambda because an electron has a mass, whereas a photon's mass is negligible.

Re: electron mass

Posted: Thu Apr 26, 2018 7:45 pm
by 004985802
mass of e =9.1095x10^-31 kg
it depends on the degree of the precision of your measurement but, yes, this small mass can make a difference

Re: electron mass

Posted: Thu Apr 26, 2018 8:17 pm
by AnnaYan_1l
It depends on what you're talking about, but yes, they have a definite mass that can be important in some contexts.

Re: electron mass

Posted: Thu Apr 26, 2018 9:03 pm
by Shimran Kumar 1C
The test definitely gives you the mass of an electron.

Re: electron mass

Posted: Sun Apr 29, 2018 4:45 pm
by yazminedesan1F
the test should definitely give you the mass of an electron, proton, and photon i believe

Re: electron mass

Posted: Sun Apr 29, 2018 11:06 pm
by fara valdez
If it is relevant, it will be provided for your calculations.

Re: electron mass

Posted: Sun Apr 29, 2018 11:09 pm
by Surya Palavali 1D
Whether it makes a difference depends on the problem. Electrons do have mass, but it's extremely small. The exact value will probably be provided on the tests.