A characteristic of the part of the atom marked "B” is that it has a large mass. Option B. This is further explained below.
Generally, Atom, the lowest possible unit into which matter may be split without releasing electrically charged particles.
In conclusion, the protons and neutrons are represented by the red and white spheres, respectively. Since it indicates both protons and neutrons, the line preceding the bracket around the balls (designated A) stands in for the atom's nucleus.The mass of the "B" section of the atom is very high.
Read more about atom
https://brainly.com/question/1566330
#SPJ1