Question

the doctor to inject the isotope 1-125
into the patient.
[2]
2. Astatine-210 is a radioactive material. The nucleus of astatine can be represented by the symbo
shown.
210 At
85
(a) Complete the table to describe the nucleus of astatine-210.
[4]
type of particle
number of particles
charge on particle
neutron
positive
(6) Astatine-210 has a half-life of 8 hours.
(1) The count rate of a sample of astatine-210 is measured over 24 hours. Redraw Fig. 2.1,
sketch a line to show how the count rate changes over the 24 hours.
[2]
count rate​

Answer 1

Answer:

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