# Lesson Worksheet: Neutron Emission Physics

In this worksheet, we will practice how to describe the process of unstable atoms decaying to a lower energy state by emitting neutrons.

**Q1: **

Beryllium-15 is an isotope of beryllium that is highly unstable. It does not occur naturally, but it can be created synthetically. Beryllium-15 decays via neutron emission. This is shown in the graph.

What isotope does beryllium-15 decay to?

- ABeryllium-16
- BBeryllium-14
- CBeryllium-13
- DBoron-14
- EBoron-15

**Q2: **

Which of the following nuclear equations correctly shows beryllium-13 undergoing neutron emission?

- A
- B
- C
- D
- E

**Q3: **

Which of the following symbols represents a neutron?

- Av
- B
- C
- D
- En

**Q5: **

The following nuclear equation shows neutron emission by lithium-12:

What is the value of in the equation?

**Q6: **

The diagram shows a nucleus undergoing neutron emission. Red circles represent protons and grey circles represent neutrons.

What isotope is shown in the diagram before the reaction takes place?

- ABoron-18
- BBoron-16
- CBoron-15
- DBoron-17

What isotope is produced through this decay?

- ABoron-17
- BBoron-16
- CBoron-15
- DBoron-14

**Q8: **

The following nuclear equation shows neutron emission by helium-5:

What is the value of in the given equation?

What is the value of in the given equation?