Which particles are smaller than protons, neutrons, and electrons and make up protons and neutrons?

Which particles are smaller than protons, neutrons, and electrons and make up protons and neutrons?

• A. Isotope
• B. Quark
• C. Atom
• D. Ion

Answer: (B)

Quarks are smaller particles that make up protons and neutrons. Protons are composed of two up quarks and one down quark, while neutrons are made of two down quarks and one up quark, all bound together by gluons. Electrons are a different type of fundamental particle called leptons, not made of quarks. Isotopes are variants of an element with different numbers of neutrons, atoms are the entire unit including nucleus and electrons, and ions are atoms with a net electric charge due to loss or gain of electrons.

Quarks are smaller particles that make up protons and neutrons. Protons are composed of two up quarks and one down quark, while neutrons are made of two down quarks and one up quark, all bound together by gluons. Electrons are a different type of fundamental particle called leptons, not made of quarks. Isotopes are variants of an element with different numbers of neutrons, atoms are the entire unit including nucleus and electrons, and ions are atoms with a net electric charge due to loss or gain of electrons.