Go to Home Page
You are here
Go to Reference Section
Go to Directories Section
Go to Community Section
Go to Fun Section
Go to Science Store
Go to About PhysLink.com
Club PhysLink
   Not a member yet?
   Get Free Membership
    Remember me
   Forgot your login?
Top Destinations Menu
 Ask the ExpertsAsk the

 Physics and Astronomy Departments DirectoryUniversity

 Discussion ForumsDiscussion

 Online Chat Online

 FREE Einstein eCardsEinstein

 PhysLink.com Science eStoreScience


Chikrii Word2TeX Software

Click here for a free 2-week trial

Become a Sponsor


Since there are such things as anti-electrons and anti-protons, is there such a thing as an anti-neutron?

Asked by: Howie Soucek


In a word: Yes. According to the standard model, every fundamental particle, has a corresponding antiparticle. for example, the antiparticle of the electron is the positron (short for 'positive electron'). However, protons and neutrons are not themselves fundamental particles; they are composed of smaller particles called quarks. A proton contains two up quarks and one down quark (uud), and a neutron contains one up and two down quarks (udd). the up quark has a charge of +2/3 and the down quark has a charge of -1/3. If you add up the charges in the proton and neutron, you will find they are the observed values. Therefore the anti-proton has two anti-up quarks and one anti-down quark (each of which having the same charge with opposite sign) giving it a total charge of -1. The antineutron contains one anti-up quark and two ant-down quarks, giving it a charge of 0, just like the regular neutron.

Answered by: Bill Zaientz, 12th Grade Student

go to the top  

All rights reserved. © Copyright '1995-'2004 PhysLink.com