(a(i))[1]
State the proton number (atomic number) for the lithium atom shown in Fig. 10.1.
(a(ii))[1]
Determine the nucleon number (mass number) of the lithium atom shown in Fig. 10.1.
(a(iii))[1]
Describe the change that a lithium atom undergoes to make a positive ion.
(b)[2]
Calculate how long it takes for the sample to decay until only 10 mg of iodine-131 are left.