State what is meant by the term elementary particle.

The strong interaction between two nucleons has a range of about 10^–15 m.

(i) Identify the boson that mediates the strong interaction. 

(ii) Determine the approximate mass of the boson in (b)(i).

particle with no internal structure / cannot be broken down further;

(i) pion/meson/gluon;

(ii) \(m = \frac{h}{{4\pi Rc}}\);

1.8x10^-28(kg);