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Complete Test Bank Essentials of Radiographic Physics and Imaging 3rd Edition Johnston Questions & Answers with rationales (Chapter 1-17) $17.49   Add to cart
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Complete Test Bank Essentials of Radiographic Physics and Imaging 3rd Edition Johnston Questions & Answers with rationales (Chapter 1-17)
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Complete Test Bank Essentials of Radiographic Physics and Imaging 3rd Edition Johnston Questions & Answers with rationales (Chapter 1-17)

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  • October 15, 2024
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,DOWNLOAD THE Test Bank for Essentials of Radiographic Physics and Imag
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ing 3rd Edition Johnston ci ci ci

Chapter 02: Structure of the Atom
ci ci ci ci ci


Johnston/Fauber: Essentials of Radiographic Physics and Imaging, 3rd Edition
ci ci ci ci ci ci ci ci




MULTIPLE CHOICE ci




1. The earliest atomic theory is generally associated with
ci ci ci ci ci ci ci


a. Bohr
b. Leucippus
c. Democritus
d. Dalton
ANS: B cici


Although his theory was somewhat vague, Leucippus is most often the earliest person associ
ci ci ci ci ci ci ci ci ci ci ci ci ci


ated with atomic theory.
ci ci ci




2. The word atom is derived from the Greek word atomos, meaning
ci ci ci ci ci ci ci ci ci ci


a. nuclear
b. small
c. indivisible
d. invisible
ANS: C cici


The Greek word atomos means ―indivisible.‖
ci ci ci ci ci




3. In the early 1800s English chemist John Dalton theorized that
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a. elements form compounds ci ci


b. atoms are unique to each element in size and mass
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c. a chemical reaction results from atoms being rearranged
ci ci ci ci ci ci ci


d. all of these ci ci




ANS: D cici


As a result of his experiments, John Dalton theorized that elements form compounds, atoms
ci ci ci ci ci ci ci ci ci ci ci ci ci ci


are unique to each element in size and mass, and that a chemical reaction results from atoms
ci ci ci ci ci ci ci ci ci ci ci ci ci ci ci ci ci


being rearranged. ci




4. Discovery of the electron is attributed to ci ci ci ci ci ci


a. Dalton
b. Bohr
c. Thomson
d. Rutherford
ANS: C cici


Joseph John ―J.J.‖ Thomson determined that the electron was a negatively charged part of th
ci ci ci ci ci ci ci ci ci ci ci ci ci ci


e atom.
ci




5. The ―plum pudding model‖ is associated with
ci ci ci ci ci ci


a. Bohr
b. Rutherford
c. Dalton
d. Thomson



mynursytest.store

,DOWNLOAD THE Test Bank for Essentials of Radiographic Physics and Imag
ci ci ci ci ci ci ci ci ci ci


ing 3rd Edition Johnston ci ci ci



ANS: D cici


Based on the physical arrangement of raisins in a plum pudding, Thomson described the ato
ci ci ci ci ci ci ci ci ci ci ci ci ci ci


m and surrounding negatively charged particles (electrons).
ci ci ci ci ci ci




6. The earliest atomic theory based on an arrangement similar to the solar system is attributed t
ci ci ci ci ci ci ci ci ci ci ci ci ci ci ci


o
a. Bohr
b. Rutherford
c. Dalton
d. Thomson
ANS: B cici


Rutherford developed the theory that the atom consisted of a very dense nucleus with small electro
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ns rotating around, similar to the sun and planets.
ci ci ci ci ci ci ci ci




7. The most commonly known modern atomic theory was developed by
ci ci ci ci ci ci ci ci ci


a. Bohr
b. Rutherford
c. Dalton
d. Thomson
ANS: A cici


Niels Bohr refined Rutherford’s atomic theory, based on the solar system, into the most com
ci ci ci ci ci ci ci ci ci ci ci ci ci ci


monly known atomic theory today.
ci ci ci ci




8. The three fundamental particles of the atom are the
ci ci ci ci ci ci ci ci


a. element, nucleus, and electron ci ci ci


b. electron, nucleus, and proton ci ci ci


c. neutron, electron, and proton ci ci ci


d. nucleus, proton, and neutron ci ci ci




ANS: C cici


The three fundamental components of the atom are the proton, electron, and neutron.
ci ci ci ci ci ci ci ci ci ci ci ci




9. The atomic nucleus contains
ci ci ci


a. protons and neutrons ci ci


b. protons and electrons ci ci


c. electrons and neutrons ci ci


d. all of these ci ci




ANS: A cici


The atomic nucleus contains varying amounts of protons and neutrons, depending on the ele
ci ci ci ci ci ci ci ci ci ci ci ci ci


ment.

10. The component of the nucleus that has a positive charge and mass is the
ci ci ci ci ci ci ci ci ci ci ci ci ci


a. electron
b. neutron
c. proton
d. none of these ci ci ci




ANS: C c i




mynursytest.store

, DOWNLOAD THE Test Bank for Essentials of Radiographic Physics and Imag
ci ci ci ci ci ci ci ci ci ci


ing 3rd Edition Johnston ci ci ci

The proton is the part of the nucleus that has a positive charge and mass.
ci ci ci ci ci ci ci ci ci ci ci ci ci ci




11. The component of the nucleus that has mass but no electrical charge is the
ci ci ci ci ci ci ci ci ci ci ci ci ci


a. electron
b. neutron
c. proton
d. none of these ci ci




ANS: B cici


The neutron is found in the nucleus; it is very similar to the proton but has no electrical char
ci ci ci ci ci ci ci ci ci ci ci ci ci ci ci ci ci ci


ge (neutral).
ci




12. The fundamental component of the atom that has the smallest mass is the
ci ci ci ci ci ci ci ci ci ci ci ci


a. electron
b. neutron
c. proton
d. none of these ci ci




ANS: A cici


The electron has significantly less mass than the neutron or proton.
ci ci ci ci ci ci ci ci ci ci




13. The mass of an atom is primarily due to the mass of the
ci ci ci ci ci ci ci ci ci ci ci ci


a. neutrons
b. nucleus
c. electrons
d. protons
ANS: B cici


The nucleus, consisting of both protons and neutrons, accounts for the majority of the mass
ci ci ci ci ci ci ci ci ci ci ci ci ci ci ci


of an atom.
ci ci




14. If an atom has more protons than electrons, it will
ci ci ci ci ci ci ci ci ci


a. have a negative charge ci ci ci


b. have a positive charge ci ci ci


c. be electrically neutral ci ci


d. have neither a positive nor negative charge
ci ci ci ci ci ci




ANS: B cici


An atom with more protons than electrons will have a positive charge.
ci ci ci ci ci ci ci ci ci ci ci




15. If an atom has more electrons than protons, it will
ci ci ci ci ci ci ci ci ci


a. have a negative charge ci ci ci


b. have a positive charge ci ci ci


c. be electrically neutral ci ci


d. have neither a positive nor negative charge
ci ci ci ci ci ci




ANS: A cici


An atom with more electrons than protons will have a negative charge.
ci ci ci ci ci ci ci ci ci ci ci




16. If an atom has the same number of electrons and protons it will
ci ci ci ci ci ci ci ci ci ci ci ci


a. have a negative charge ci ci ci




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