Question

What is the particle that is labeled with a question mark (?) in the diagram?

beta particle
quark
isotope
alpha particle

Answer 1

The answer is (b)= a quark

Answer 2

Answer is: quark.

Quark is a type of elementary particle and a fundamental constituent of matter.

Quarks form composite hadrons (protons and neutrons). Protons and neutrons are in the nucleus of an atom.

Hadrons include baryons (protons and neutrons) and mesons.

There are six types of quarks: up, down, strange, charm, bottom, and top.