Chapter 02: Radiation Physics

Chapter 02: Radiation Physics

 

Complete Chapter Questions With Answers

 

Sample Questions Are Posted Below

 

MULTIPLE CHOICE

 

1. The fundamental unit of matter is the

a.	proton.
b.	neutron.
c.	electron.
d.	atom.

 

 

ANS:  D

A proton is a subatomic particle; the fundamental unit of matter is the atom. A neutron is a subatomic particle; the fundamental unit of matter is the atom. An electron is a subatomic particle; the fundamental unit of matter is the atom. The fundamental unit of matter is the atom.

 

DIF:    Recall             REF:   Page 8            OBJ:   1

TOP:   CDA, RHS, III.B.2. Describe the characteristics of x-radiation

MSC:  NBDHE, 2.0 Obtaining and Interpreting Radiographs | NBDHE, 2.1 Principles of radiophysics and radiobiology

 

2. The nucleus of an atom contains

a.	protons.
b.	neutrons.
c.	protons and neutrons.
d.	electrons.

 

 

ANS:  C

The nucleus of an atom contains neutrons as well as protons. The nucleus of an atom contains protons as well as neutrons. The nucleus of an atom contains protons and neutrons. The nucleus of an atom does not contain electrons; it contains protons and neutrons.

 

DIF:    Recall             REF:   Page 8            OBJ:   2

TOP:   CDA, RHS, III.B.2. Describe the characteristics of x-radiation

MSC:  NBDHE, 2.0 Obtaining and Interpreting Radiographs | NBDHE, 2.1 Principles of radiophysics and radiobiology

 

3. Which subatomic particle carries a negative electrical charge?

a.	A neutron
b.	A proton
c.	An electron
d.	A nucleon

 

 

ANS:  C

A neutron does not carry an electrical charge. A proton carries a positive electrical charge. An electron carries a negative electrical charge. A nucleon carries a positive (proton) or no (neutron) electrical charge.

 

DIF:    Comprehension                               REF:   Page 8            OBJ:   2

TOP:   CDA, RHS, III.B.2. Describe the characteristics of x-radiation

MSC:  NBDHE, 2.0 Obtaining and Interpreting Radiographs | NBDHE, 2.1 Principles of radiophysics and radiobiology

 

4. Which of the following elements is the simplest atom?

a.	Hydrogen (H #1)
b.	Helium (He #2)
c.	Nitrogen (N #7)
d.	Oxygen (O #8)

 

 

ANS:  A

Atomic numbers are assigned from simplest to most complex. Hydrogen is the simplest atom; with a single proton, it has an atomic number of 1. Helium has an atomic number of 2. Nitrogen has an atomic number of 7. Oxygen has an atomic number of 8.

 

DIF:    Comprehension                               REF:   Page 8            OBJ:   2

TOP:   CDA, RHS, III.B.2. Describe the characteristics of x-radiation

MSC:  NBDHE, 2.0 Obtaining and Interpreting Radiographs | NBDHE, 2.1 Principles of radiophysics and radiobiology

 

5. Which of the following statements is true of orbits or shells in the atom?

a.	Protons travel around the nucleus in well-defined shells.
b.	An atom contains innumerable shells.
c.	The energy level within each shell is the same.
d.	The orbiting shell closest to the nucleus has the highest energy level.

 

 

ANS:  D

Electrons travel around the nucleus in well-defined shells. An atom contains a maximum of seven shells. Each of the maximum seven shells within an atom represents a different energy level. The orbiting shell closest to the nucleus has the highest energy level. The K shell is the orbiting shell closest to the nucleus.

 

DIF:    Comprehension                               REF:   Page 8            OBJ:   2

TOP:   CDA, RHS, III.B.2. Describe the characteristics of x-radiation

MSC:  NBDHE, 2.0 Obtaining and Interpreting Radiographs | NBDHE, 2.1 Principles of radiophysics and radiobiology