Lesson Worksheet: Neutron Emission Physics

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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?

Q3:

Which of the following symbols represents a neutron?

Q4:

The following nuclear equation shows neutron emission by boron-18.

What is the name of element X?

ACarbon
BNitrogen
CBeryllium
DLithium
EBoron

What element symbol should replace X?

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

Q7:

When an unstable nucleus emits a neutron, by how much does the atomic number of the nucleus change?

Q8:

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

What is the value of in the given equation?

Q9:

When an unstable nucleus emits a neutron, by how much does the charge of the nucleus change?

Q10:

When an unstable nucleus emits a neutron, by how much does the mass number of the nucleus change?

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