Arrange , , and rays in decreasing order of their penetrating power through solid matter. — Nuclear Chemistry and Radioactivity Chemistry Question

💡 Solution & Explanation

Penetrating power is inversely related to ionizing power and mass. $\gamma$ -rays have zero mass and zero charge, giving them the highest penetrating power. $\beta$ -particles are intermediate, and massive $\alpha$ -particles have the lowest penetrating power (easily stopped by air/paper).