Basic Physics of Nuclear Medicine/Radioactive Decay MCQ

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1. Gamma-ray photons have:

	no mass and no electric charge
→	Correct Answer - see Gamma Decay.
	no mass and an electric charge of +1
	no mass and an electric charge of +2
	no mass and an electric charge of -1

2. Electron Capture involves:

	an electron combining with a neutron
	a neutron being ejected from the nucleus
	an electron combining with a proton
→	Correct Answer - see Beta Decay.
	an electron being ejected from the nucleus

3. In Alpha Decay:

	Z and A are unchanged
	Z decreases by 4 and A decreases by 2
	Z decreases by 2 and A decreases by 4
→	Correct Answer - see Alpha Decay.
	Z decreases by 4 and A decreases by 4

4. Isomeric Transition involves:

	the emission of a gamma-ray
→	Correct Answer - see Gamma Decay.
	the conversion of a neutron to a proton
	the conversion of a proton to a neutron
	K-capture

5. In spontaneous fission:

	nuclear stability is always achieved
	the nucleus splits into 2 or 3 fragments
→	Correct Answer - see Spontaneous Fission.
	the fragments are never radioactive
	the nucleus is unchanged

6. An alpha-particle consists of:

	one proton and two neutrons
	two protons and one neutron
	two protons and two neutrons
→	Correct Answer - see Alpha Decay.
	one proton and one neutron

7. Internal Conversion involves:

	the emission of a gamma-ray
→	Correct Answer - see Gamma Decay.
	the conversion of a neutron to a proton
	K-capture
	none of the above processes

8. Electron Emission involves the ejection of:

	a beta-minus particle
→	Correct Answer - see Beta Decay.
	an alpha-particle
	a beta-plus particle
	a proton and two neutrons

9. In Positron Emission:

	Z increases by 1 and A remains the same
	Z decreases by 1 and A remains the same
→	Correct Answer - see Beta Decay.
	Z remains the same and A decreases by 1
	Z remains the same and A increases by 1

10. Positron Emission involves the ejection of:

	an alpha-particle
	a beta-minus particle
	a beta-plus particle
→	Correct Answer - see Beta Decay.
	a proton and a neutron

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