The table gives some properties of different types of radiation.
| Type of radiation | Nature | Relative charge | Deflected by magnetic fields? |
|---|---|---|---|
| alpha (α\alphaα) | helium nucleus | missing property (1) | Yes |
| beta-minus (β−\beta^-β−) | high-energy electron | -1 | Yes |
| gamma (γ\gammaγ) | missing property (2) | 0 | No |
Complete the table by identifying the two missing properties.
Which type of radiation from the table is the most strongly ionising?
Which type of radiation from the table is typically absorbed by a few millimetres of aluminium?
Radium-226 is a radioactive isotope of radium.
It decays by alpha emission to form an isotope of radon (Rn).
Complete the nuclear equation for the decay of radium-226 by filling in the missing numbers in the boxes:
22688Ra⟶22286Rn+42α \begin{array}{c} \boxed{226} \\ \boxed{88} \end{array}\text{Ra} \longrightarrow \begin{array}{c} \boxed{\phantom{222}} \\ \boxed{\phantom{86}} \end{array}\text{Rn} + \begin{array}{c} \boxed{\phantom{4}} \\ \boxed{2} \end{array}\alpha 22688Ra⟶22286Rn+42α
