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Test Bank (Complete Download) For Essentials of Radiographic Physics and Imaging 2nd Edition by Johnston ISBN: 9780323339667 Instantly Downloadable Test Bank

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Test Bank (Complete Download) For Essentials of Radiographic Physics and Imaging 2nd Edition by Johnston ISBN: 9780323339667 Instantly Downloadable Test Bank

Chapter 02: Structure of the Atom
Johnston: Essentials of Radiographic Physics and Imaging, 2nd Edition
MULTIPLE CHOICE
1. The earliest atomic theory is generally associated with
a. Bohr
b. Leucippus
c. Democritus
d. Dalton
ANS: B
Although his theory was somewhat vague, Leucippus is most often the earliest person
associated with atomic theory.
REF: 16 OBJ: 1
2. The word atom is derived from the Greek word atomos, meaning
a. nuclear
b. small
c. indivisible
d. invisible
ANS: C
The Greek word atomos means “indivisible.”
REF: 16 OBJ: 1
3. In the early 1800s English chemist John Dalton theorized that
a. elements form compounds
b. atoms are unique to each element in size and mass
c. a chemical reaction results from atoms being rearranged
d. all of the above
ANS: D
As a result of his experiments, John Dalton theorized that elements form compounds, atoms
are unique to each element in size and mass, and that a chemical reaction results from atoms
being rearranged.
REF: 16 OBJ: 1
4. Discovery of the electron is attributed to
a. Dalton
b. Bohr
c. Thomson
d. Rutherford
ANS: C
Joseph John “J.J.” Thomson determined that the electron was a negatively charged part of the
atom

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