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From Wikibooks, open books for an open world
<
Basic Physics of Nuclear Medicine
Point added for a correct answer:
Points for an incorrect answer:
Ignore the questions' coefficients:
1
Electrons are positioned:
inside the nucleus
outside the nucleus
both inside and outside the nucleus
at all of the above locations
2
Mass Number is defined as:
the number of protons plus the number of neutrons in a nucleus
the number of neutrons in a nucleus
the complement of the Atomic Number
the number of protons in a nucleus
3
An atom can be considered as consisting mostly of:
isotopes
empty space
water
neutrons
4
The number of known isotopes is roughly:
5,000
2,500
1,000
100
5
Atomic Number is defined as:
the inverse of the Mass Number
the number of protons plus the number of neutrons in a nucleus
the number of protons in a nucleus
the number of neutrons in a nucleus
6
The radius of a nucleus is how much smaller than that of an atom:
10 times
100 times
1,000 times
10,000 times
7
For an atom to be electrically neutral, the number of:
protons equals the number of electrons
neutrons equals the number of electrons
protons equals the number of neutrons
protons equals the number of nucleons
8
Nuclear binding energies are usually expressed in units of:
keV
MeV
joules
eV
9
The Hydrogen-3 nucleus (also called Tritium) consists of:
two neutrons and one proton
two protons and one neutron
two neutrons and two protons
two neutrons and no protons
10
Isotopes are nuclei with:
same A and Z
same Z, different A
same A, different Z
Z greater than A
11
Radioactivity is the process of:
an unstable nucleus becoming stable
an electron moving to a higher energy shell
an electron moving to a lower energy shell
a stable nucleus becoming unstable
12
The number of protons in a nucleus is expressed by the symbol:
A
Z
X
M
13
How many neutrons are in a Uranium-235 nucleus?
235
146
92
143
14
The two main parts of an atom are called:
nucleus and protons
atom and molecule
molecule and electron
none of the above
15
Which of the following is the smallest?
a molecule
an atom
a nucleus
an electron
16
Which one of the following is a nucleon?
proton
electron
nucleus
molecule
17
One Atomic Mass Unit is about:
one millionth of a gram
one million, millionth of a gram
one million, million, millionth of a gram
one million, million, million, millionth of a gram
18
In the symbol Cs-137, the number 137 represents:
the mass number
the number of electrons
the atomic number
Avagadro's number
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