21. Which statement best describes the relationship between atoms and nuclear forces? (2 points) Strong nuclear forces hold the nucleus of an atom together. Weak nuclear forces hold neutrons and electrons together. O Weak nuclear forces hold the nucleus of an atom together. Strong nuclear forces are responsible for breaking down atoms. w O weak nuclear forces hold small atoms together. Strong nuclear forces hold large atoms together. O Strong nuclear forces hold the nucleus of an atom together. Weak nuclear forces are involved when certain types of atoms break down.