Chapter 03: The Structure of Matter Bushong: Radiologic Science for
Technologists
MULTIPLE CHOICE
1. The term ―atom‖ was first used by the .
a. Ethiopians
b. British
c. Greeks
d. Romans
ANS: C
The term ―atom‖ was first used by the Greeks.
2. The first person to describe an element as being composed of identical atoms was
.
a. J. J. Thomson
b. John Dalton
c. Dmitri Mendeleev
d. Niels Bohr
ANS: B
The first person to describe an element as being composed of identical atoms was John
Dalton.
3. The smallest particle that has all the properties of an element is a(n) . a.
neutron
b. proton
c. electron
d. atom
ANS: D
The smallest particle that has all the properties of an element is an atom.
4. The periodic table of the elements was developed by in the late 19th century. a.
Bohr
b. Rutherford
c. Mendeleev
d. Roentgen
ANS: C
The Periodic Table was developed by Mendeleev.
5. Rutherford’s experiments in 1911 showed that the atom was composed of
.
, a. electrons with well-defined orbits
b. a nucleus with an electron cloud
c. electrified plum pudding
d. a ball of hooks and eyes
ANS: C
Rutherford’s experiments in 1911 showed that the atom was composed of a nucleus with
an electron cloud.
6. A positively charged nucleus surrounded by negatively charged electrons in well-
defined orbits is the model of the atom. a. Bohr
b. Thomson
c. Rutherford
d. Dalton
ANS: A
A positively charged nucleus surrounded by negatively charged electrons in well-defined
orbits is the Bohr model of the atom.
7. What are the fundamental particles of an atom?
a. Quark, positron, negatron
b. Nucleon, electron, proton
c. Proton, neutron, quark
d. Proton, electron, neutron
ANS: D
The fundamental particles of an atom are the proton, electron, and neutron.
8. The chemical element is determined by the number of in the atom. a. protons
b. electrons
c. neutrons
d. nucleons
ANS: A
The chemical element is determined by the number of protons in the atom.
9. An atom in a normal state has an electrical charge of .
a. one
b. zero
c. positive
d. negative
ANS: B
An atom in a normal state has an electrical charge of zero.
10. The binding energies, or energy levels, of electrons are represented by their . a.
atomic numbers
Technologists
MULTIPLE CHOICE
1. The term ―atom‖ was first used by the .
a. Ethiopians
b. British
c. Greeks
d. Romans
ANS: C
The term ―atom‖ was first used by the Greeks.
2. The first person to describe an element as being composed of identical atoms was
.
a. J. J. Thomson
b. John Dalton
c. Dmitri Mendeleev
d. Niels Bohr
ANS: B
The first person to describe an element as being composed of identical atoms was John
Dalton.
3. The smallest particle that has all the properties of an element is a(n) . a.
neutron
b. proton
c. electron
d. atom
ANS: D
The smallest particle that has all the properties of an element is an atom.
4. The periodic table of the elements was developed by in the late 19th century. a.
Bohr
b. Rutherford
c. Mendeleev
d. Roentgen
ANS: C
The Periodic Table was developed by Mendeleev.
5. Rutherford’s experiments in 1911 showed that the atom was composed of
.
, a. electrons with well-defined orbits
b. a nucleus with an electron cloud
c. electrified plum pudding
d. a ball of hooks and eyes
ANS: C
Rutherford’s experiments in 1911 showed that the atom was composed of a nucleus with
an electron cloud.
6. A positively charged nucleus surrounded by negatively charged electrons in well-
defined orbits is the model of the atom. a. Bohr
b. Thomson
c. Rutherford
d. Dalton
ANS: A
A positively charged nucleus surrounded by negatively charged electrons in well-defined
orbits is the Bohr model of the atom.
7. What are the fundamental particles of an atom?
a. Quark, positron, negatron
b. Nucleon, electron, proton
c. Proton, neutron, quark
d. Proton, electron, neutron
ANS: D
The fundamental particles of an atom are the proton, electron, and neutron.
8. The chemical element is determined by the number of in the atom. a. protons
b. electrons
c. neutrons
d. nucleons
ANS: A
The chemical element is determined by the number of protons in the atom.
9. An atom in a normal state has an electrical charge of .
a. one
b. zero
c. positive
d. negative
ANS: B
An atom in a normal state has an electrical charge of zero.
10. The binding energies, or energy levels, of electrons are represented by their . a.
atomic numbers
