A distinctive feature of quarks is that they
A) have fractional electric charge.
B) have zero charge.
C) are always observed singly, since they do not readily interact with other particles.
D) have zero rest mass.

Question

Quizplus · Accepted Answer

Quarks have fractional electric charges, unlike most other particles, which have integer electric charges (e.g., proton +1, electron -1). This is a fundamental property that distinguishes them in the standard model of particle physics.

A Distinctive Feature of Quarks Is That They