The table gives some properties of different types of radiation.
| Type of radiation | Nature | Relative charge | Ionising ability |
|---|---|---|---|
| alpha (α\alphaα) | missing property (1) | +2 | high |
| beta (β\betaβ) | electron | -1 | medium |
| gamma (γ\gammaγ) | electromagnetic wave | missing property (2) | low |
(i) Complete the table by identifying the two missing properties.
(ii) Which type of radiation from the table has the highest penetrating power?
(iii) Which type of radiation from the table can be completely absorbed by a thin sheet of paper?
Cobalt-60 is a radioactive isotope of cobalt.
It decays by beta emission to form an isotope of nickel.
Complete the nuclear equation for the decay of cobalt-60 by filling in the missing numbers in the boxes:
6027Co⟶6027Ni+60−1β \begin{array}{c} \boxed{60} \\ \boxed{27} \end{array}\text{Co} \longrightarrow \begin{array}{c} \boxed{\phantom{60}} \\ \boxed{\phantom{27}} \end{array}\text{Ni} + \begin{array}{c} \boxed{\phantom{60}} \\ \boxed{-1} \end{array}\beta 6027Co⟶6027Ni+60−1β
