(a)[5]
Describe the structure of an atom of this fluorine isotope. In your answer, include: • where the protons, neutrons and electrons are found in the atom • how many protons, neutrons and electrons are present in the atom.
(b)[3]
Complete the sentence on isotopes using words from the list. atomic, compound, element, ions, molecular, nucleons Isotopes are atoms of the same ................. that have the same ................. number but different numbers of ................. .
(c)[1]
Give one medical use of radioactive isotopes.
(d)[1]
Which one of the following isotopes is used to provide energy? Draw a circle around the correct answer. $^{127}_{53}\text{I}$ $^{235}_{92}\text{U}$ $^{131}_{54}\text{Xe}$ $^{66}_{30}\text{Zn}$