22 - The Nuclear Atom
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The Nuclear Atom
MAY 2002
1 2210Ne represents an atom of neon.
How many neutrons does it have?
A 10 B 12 C 22 D 32
NOVEMBER 2002
2 Which line in the table gives the numbers of protons and neutrons in the nuclide 73
Li?
protons neutrons
A 3 4
B 3 7
C 4 3
D 7 3
MAY 2003
3 An atom of lithium contains three protons and three electrons.
The nucleon number (mass number) of the atom is 7.
How many neutrons are there in the atom?
A 3 B 4 C 7 D 10
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NOVEMBER 2003
4 Which line in the table shows the structure of the nucleus of a helium atom 42He?
5 A nucleus of substance X has the symbol 2612 X.
How many electrons orbit around the nucleus of a neutral atom of substance X?
A 12
B 14
C 26
D 38
A
B
C
D
electrons
2
2
0
2
neutrons
2
0
2
2
protons
0
2
2
2
MAY 2004
6 How many nucleons are in a nucleus of K39
19?
A 19 B 20 C 39 D 58
NOVEMBER 2004
7 How many neutrons are in a nucleus of C14
6?
A 0 B 6 C 8 D 14
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MAY 2005
8 In the symbol below, A is the nucleon number and Z is the proton number.
XA
Z
What is represented by the symbol?
A an electron
B a neutron
C a nuclide
D an X-ray
NOVEMBER 2005
9 Which particles are found in the nucleus of an atom?
A neutrons and protons only
B neutrons only
C protons and electrons only
D protons, electrons and neutrons
MAY 2006
10 The nucleus of a neutral atom of lithium is represented by Li.73
How many protons, electrons and neutrons does the atom contain?
protons electrons neutrons
A 7 7 3
B 3 7 3
C 3 4 4
D 3 3 4
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NOVEMBER 2006
11 Which statement is true of all neutral atoms?
A The number of electrons equals the number of nucleons.
B The number of neutrons equals the number of protons.
C The number of nucleons equals the number of neutrons.
D The number of protons equals the number of electrons.
12 There are three nuclides of hydrogen.
nuclide 1 nuclide 2 nuclide 3
1
1H
2
1H
3
1H
Which of these nuclides have the same number of protons in their nuclei?
A 1 and 2 only
B 2 and 3 only
C all of them
D none of them
MAY 2007
13 The data below relates to the nucleus of a particular neutral atom of nitrogen.
proton number Z = 7
nucleon number A = 17
Which row represents the correct number of neutrons and electrons in this atom?
number of neutrons number of electrons
A 10 7
B 10 10
C 17 7
D 17 10
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NOVEMBER 2007
14 An atom of the element lithium has a nucleon number of 7 and a proton number of 3.
Which diagram represents a neutral atom of lithium?
n
n+
+
+
A
n+ +
+
B
nn
n n++
+nn
n n++
+
C
n
+
D
= a neutron
= a proton
= an electron
key
(not to scale)
MAY 2008
15 A particular nuclide has the symbol 3717Cl .
What is true for atoms of this nuclide?
A There are 17 nucleons in the nucleus.
B There are 17 protons in the nucleus.
C There are 37 electrons in the nucleus.
D There are 37 neutrons in the nucleus.
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NOVEMBER 2008
A uranium U238
92nucleus emits an -particle.
What are the new nucleon and proton numbers?
nucleon number proton number
A 238 88
B 236 90
C 234 92
D 234 90
MAY 2009
17 N16
7is the symbol for a particular nuclide of nitrogen.
How many nucleons does this nuclide contain?
A 7 B 9 C 16 D 23
NOVEMBER 2009
How many neutrons and how many protons are contained in a nucleus of U23892
?
neutrons protons
A 92 146
B 146 92
C 146 238
D 238 92
16
18
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MAY 2010
19 The nuclide notation for radium-226 is Ra226
88.
How many electrons orbit the nucleus of a neutral atom of radium-226?
A 0 B 88 C 138 D 226
NOVEMBER 2010
20 In the atomic model, an atom consists of a central mass, orbited by much smaller particles.
centralmass
orbiting
particles
What is the name of the central mass and of the orbiting particles?
central mass orbiting particles
A neutron -particles
B neutron electrons
C nucleus -particles
D nucleus electrons
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MAY 2011
21 An atom of the element lithium has a nucleon number of 7 and a proton number of 3.
Which diagram represents a neutral atom of lithium?
n
n+
+
+
A
n+ +
+
B
nn
n n++
+nn
n n++
+
C
n
+
D
= a neutron
= a proton
= an electron
key
(not to scale)
NOVEMBER 2011
22 A nuclide of substance X has the symbol X2612
.
How many electrons are there in a neutral atom of substance X?
A 12 B 14 C 26 D 38
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MAY 2012
23 Which diagram could represent the structure of a neutral atom?
+
+
keyneutron
proton
electron
A B
+ +
+ +
C
++ +
D
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The Nuclear Atom
1 B 11 D 21 C
2 A 12 C 22 A
3 B 13 A
4 C 14 C
5 A 15 B
6 C 16 D
7 C 17 C
8 C 18 B
9 A 19 B
10 D 20 D
23 B
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