The table below shows the ability of three different types of radiation, $P$ , $Q$ , and $R$ , to penetrate various materials:

\begin{array}{|c|c|c|c|} \hline \text{Radiation} & \text{Penetrates paper?} & \text{Penetrates } 5\text{ mm of aluminium?} & \text{Penetrates } 50\text{ mm of lead?} \\ \hline P & \text{Yes} & \text{No} & \text{No} \\ \hline Q & \text{No} & \text{No} & \text{No} \\ \hline R & \text{Yes} & \text{Yes} & \text{No} \\ \hline \end{array}

Which row correctly identifies $P$ , $Q$ , and $R$ ?

$P$ : $α\alpha$ -particles, $Q$ : $β\beta$ -particles, $R$ : $γ\gamma$ -rays

$P$ : $β\beta$ -particles, $Q$ : $α\alpha$ -particles, $R$ : $γ\gamma$ -rays

$P$ : $β\beta$ -particles, $Q$ : $γ\gamma$ -rays, $R$ : $α\alpha$ -particles

$P$ : $γ\gamma$ -rays, $Q$ : $α\alpha$ -particles, $R$ : $β\beta$ -particles

The table below shows the ability of three different types of radiation, $P$ , $Q$ , and $R$ , to penetrate various materials:

\begin{array}{|c|c|c|c|} \hline \text{Radiation} & \text{Penetrates paper?} & \text{Penetrates } 5\text{ mm of aluminium?} & \text{Penetrates } 50\text{ mm of lead?} \\ \hline P & \text{Yes} & \text{No} & \text{No} \\ \hline Q & \text{No} & \text{No} & \text{No} \\ \hline R & \text{Yes} & \text{Yes} & \text{No} \\ \hline \end{array}

Which row correctly identifies $P$ , $Q$ , and $R$ ?

$P$ : $α\alpha$ -particles, $Q$ : $β\beta$ -particles, $R$ : $γ\gamma$ -rays

$P$ : $β\beta$ -particles, $Q$ : $α\alpha$ -particles, $R$ : $γ\gamma$ -rays

$P$ : $β\beta$ -particles, $Q$ : $γ\gamma$ -rays, $R$ : $α\alpha$ -particles

$P$ : $γ\gamma$ -rays, $Q$ : $α\alpha$ -particles, $R$ : $β\beta$ -particles

5.2.2a Alpha, beta and gamma emission

5.2.2a Alpha, beta and gamma emission Questions