1 | Page
LRA 211 Week 1 Questions and Correct
Answers
Why do we need to understand atomic structure and the radiation
spectrum for our profession? Ans: To understand the interactions
in the x-ray tube
What process occurs at the atomic scale within the x-ray tube?
Ans: Emission of x-ray photons
In what ways could you exemplify atomic structure? Ans:
Rutherford used a model resembling the solar system
Bohr's theory states what three particles are essential in atomic
composition? Ans: Electrons, protons, and neutrons
What is the electrical charge of the proton? Ans: Positive
What carries no electrical charge? Ans: Neutron
What is the electrical charge of the electron? Ans: Negative
Why do we use specific elements in radiology based on atomic
compensation? Ans: Interaction with the x-ray
Why is tungsten used within the x-ray production? Ans: Tungsten
is used because of its high atomic number and high melting point
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, 2 | Page
What two particles are within the nucleus? Ans: Protons and
neutrons
What force binds neutrons and protons together? Ans: Binding
energy - nuclear binding energy
What factors influence strength of electrons binding energy? Ans:
Distance from the nucleus and how many protons are present
What's the shell closets to the nucleus? Ans: K-shell (innermost)
How many electrons can each shell hold? Ans: K can only hold 2,
then 8
What units of measurement do we use for "frequency"? Ans: Hertz
(Hz)
When dealing with electromagnetic radiation the relation between
"frequency" and "wavelength" is? Ans: Inverse
How does electromagnetic radiation travel in a vacuum? Ans: At
the speed of light
On the electromagnetic spectrum which has the smallest
wavelength? Ans: Gamma rays
What makes gamma rays and x-rays harmful? Ans: The ability to
ionize matter
© 2025 All rights reserved
LRA 211 Week 1 Questions and Correct
Answers
Why do we need to understand atomic structure and the radiation
spectrum for our profession? Ans: To understand the interactions
in the x-ray tube
What process occurs at the atomic scale within the x-ray tube?
Ans: Emission of x-ray photons
In what ways could you exemplify atomic structure? Ans:
Rutherford used a model resembling the solar system
Bohr's theory states what three particles are essential in atomic
composition? Ans: Electrons, protons, and neutrons
What is the electrical charge of the proton? Ans: Positive
What carries no electrical charge? Ans: Neutron
What is the electrical charge of the electron? Ans: Negative
Why do we use specific elements in radiology based on atomic
compensation? Ans: Interaction with the x-ray
Why is tungsten used within the x-ray production? Ans: Tungsten
is used because of its high atomic number and high melting point
© 2025 All rights reserved
, 2 | Page
What two particles are within the nucleus? Ans: Protons and
neutrons
What force binds neutrons and protons together? Ans: Binding
energy - nuclear binding energy
What factors influence strength of electrons binding energy? Ans:
Distance from the nucleus and how many protons are present
What's the shell closets to the nucleus? Ans: K-shell (innermost)
How many electrons can each shell hold? Ans: K can only hold 2,
then 8
What units of measurement do we use for "frequency"? Ans: Hertz
(Hz)
When dealing with electromagnetic radiation the relation between
"frequency" and "wavelength" is? Ans: Inverse
How does electromagnetic radiation travel in a vacuum? Ans: At
the speed of light
On the electromagnetic spectrum which has the smallest
wavelength? Ans: Gamma rays
What makes gamma rays and x-rays harmful? Ans: The ability to
ionize matter
© 2025 All rights reserved
