(a(i))[3]
Complete the paths of the three $\alpha$-particles on Fig. 11.1.
(a(ii))[1]
State the sign of the charge carried by the $\alpha$-particles.
(b)[3]
State how many electrons, neutrons and protons are present in a neutral atom of gold-198.
Physics 0625 · IGCSE · The nuclear model of the atom
The nuclear model of the atom — practice question
Fig. 11.1 illustrates the routes of three $\alpha$-particles approaching a thin gold foil. Four gold nuclei are indicated.