The figure given below shows how the three types of radiation from radioactive substances are absorbed by different materials.

The figure uses symbols. Write full name of $\beta$.

The figure given below shows how the three types of radiation from radioactive substances are absorbed by different materials.

The figure uses symbols. Write full name of $\gamma$.

The figure given below shows how the three types of radiation from radioactive substances are absorbed by different materials.

State which type of radiation is most penetrating.

The figure given below shows how the three types of radiation from radioactive substances are absorbed by different materials.

State which type of radiation can be absorbed by a few centimetres of air or by a thin sheet of paper.

The figure given below shows how the three types of radiation from radioactive substances are absorbed by different materials.

State which types of radiation are absorbed by a thick sheet of lead.

The radiation from radioactive substances is called 'ionising radiation'. This is because it can damage atoms, causing them to become ions.

Explain the meaning of the term 'ion'.

State which type of ionising radiation has no mass.

State which type of ionising radiation has a positive charge.

State which type of ionising radiation is an electron.