(a)[4]
Complete Table 12.1 by naming the two particle types found in a caesium-137 nucleus, and state how many of each there are.
(b)[2]
Caesium has more than one isotope. Explain what is meant by the word isotope.
Physics 0625 · IGCSE · The nuclear model of the atom
The nuclear model of the atom — practice question
Caesium-137 is produced in nuclear reactors. The nucleus of caesium-137 may be shown as $^{137}_{55}\text{Cs}$.