electron mass
Moderators: Chem_Mod, Chem_Admin
-
- Posts: 26
- Joined: Fri Apr 06, 2018 11:02 am
-
- Posts: 23855
- Joined: Thu Aug 04, 2011 1:53 pm
- Has upvoted: 1253 times
Re: electron mass
It depends on what you are talking about. The value is important in knowing for fields which study electronic transport etc.
-
- Posts: 24
- Joined: Fri Apr 06, 2018 11:01 am
Re: electron mass
Electrons have a mass but in comparison to protons and neutrons in an atom, they will not affect the total mass I think.
-
- Posts: 30
- Joined: Fri Apr 06, 2018 11:04 am
-
- Posts: 30
- Joined: Fri Apr 06, 2018 11:04 am
- Been upvoted: 1 time
Re: electron mass
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.
-
- Posts: 29
- Joined: Fri Apr 06, 2018 11:02 am
Re: electron mass
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
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
Best,
Jack Dias
-
- Posts: 40
- Joined: Thu Feb 15, 2018 3:00 am
-
- Posts: 31
- Joined: Thu Feb 01, 2018 3:01 am
Re: electron mass
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
-
- Posts: 40
- Joined: Fri Apr 06, 2018 11:02 am
Re: electron mass
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
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
it depends on the degree of the precision of your measurement but, yes, this small mass can make a difference
-
- Posts: 96
- Joined: Fri Apr 06, 2018 11:05 am
- Been upvoted: 1 time
Re: electron mass
It depends on what you're talking about, but yes, they have a definite mass that can be important in some contexts.
-
- Posts: 30
- Joined: Fri Apr 06, 2018 11:03 am
-
- Posts: 40
- Joined: Thu Feb 15, 2018 3:00 am
Re: electron mass
the test should definitely give you the mass of an electron, proton, and photon i believe
-
- Posts: 48
- Joined: Fri Apr 06, 2018 11:05 am
-
- Posts: 24
- Joined: Fri Apr 06, 2018 11:04 am
Re: electron mass
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.
Return to “Properties of Electrons”
Who is online
Users browsing this forum: No registered users and 4 guests