Question

scientists have broken down protons and neutrons into smaller particles called * 2 points nuclei quarks vacuoles isotopes atoms consist of a positively charged center called a(n)

Explanation:

Protons and neutrons are composed of smaller particles known as quarks. Nuclei are made up of protons and neutrons, vacuoles are cell - related structures, and isotopes are different forms of an element with the same number of protons but different numbers of neutrons.

Answer:

B. quarks