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:

质子由夸克组成，科学家用加速器和高能电子研究氦原子质子内的粒子，即夸克。

Answer:

the He quarks