Question

a scientist uses an accelerator and high energy electrons to study the particles inside the protons of a helium atom. what particles is the scientist studying? the he neutrons the he nucleus the he electrons the he quarks

Explanation:

Protons are made up of quarks. Neutrons are a different sub - atomic particle. The nucleus is a collection of protons and neutrons. Electrons are outside the nucleus. Since the question is about particles inside protons, quarks are the relevant particles.

Answer:

the He quarks