**Q1: **

Astatine-218 undergoes beta decay to Radon-218. Radon-218 undergoes alpha decay to polonium-214. This is shown in the following nuclear equation.

What is the value of in the equation?

What is the value of in the equation?

**Q2: **

Which type of nuclear radiation has no mass?

- ABeta particles
- BAlpha particles
- CNeutrons
- DGamma rays

**Q3: **

The diagram shows a beryllium-11 nucleus undergoing two-step radioactive decay. Red circles represent protons, gray circles represent neutrons, and blue circles represent electrons. What isotope is produced through this reaction?