Which of the following particles has a quark content of udd?
A)proton
B)neutron
C)electron
D)pion
E)kaon

Question

Quizplus · Accepted Answer

The quark content of a neutron is udd, which means it contains two down quarks and one up quark. Protons have a quark content of uud (two up quarks and one down quark), electrons are leptons and do not have quarks, pions have a quark-antiquark pair (u, d or d, u), and kaons can have different quark content such as s-antiup or d-antistrange.

Which of the Following Particles Has a Quark Content of Udd