Topic 1 - Atomic Structure (Distress Flares)

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Atomic Structure Revision
1. Protons have a
A. positive charge and are found outside the nucleus
B. positive charge and are found inside the nucleus
C. negative charge and are found outside the nucleus
D. no charge and are found inside the nucleus
2. Neutrons have a
A. positive charge and are found outside the nucleus
B. positive charge and are found inside the nucleus
C. negative charge and are found outside the nucleus
D. no charge and are found inside the nucleus
3. Electrons have a
A. positive charge and are found outside the nucleus
B. positive charge and are found inside the nucleus
C. negative charge and are found outside the nucleus
D. no charge and are found inside the nucleus
4. The mass of a proton is approximately
A. 0 a.m.u.
B. 1 a.m.u.
C. 10 a.m.u.
D. 100 a.m.u.
5. The mass of a neutron is approximately
A. 0 a.m.u.
B. 1 a.m.u.
C. 10 a.m.u.
D. 100 a.m.u.
6. The mass of an electron is approximately
A. 0 a.m.u.
B. 1 a.m.u.
C. 10 a.m.u.
D. 100 a.m.u.
7. The reason an atom has no charge is because
A. the number of neutrons equals the number of electrons
B. the number of protons equals the number of neutrons
C. the number of particles in the nucleus equals the number of electrons
D. the number of protons equals the number of electrons
8. The atomic number of an element is the number of
A. electrons outside the nucleus
B. neutrons in the nucleus
C. protons in the nucleus
D. protons and neutrons in the nucleus
9. The mass number of an element is the number of
A. electrons outside the nucleus
B. neutrons in the nucleus
C. protons in the nucleus
D. protons and neutrons in the nucleus
Atomic Structure Revision
10. The electron arrangement for a potassium atom is
A. 2.8.1
B. 2.8.8.1
C. 2.8.8
D. 2.8.18.8.1
11. In an atom, electrons are arranged in energy levels. The number of energy levels in a
chlorine atom is
A. 1
B. 2
C. 3
D. 4
12. The elements in group 5 of the Periodic Table all have
A. 5 electrons in their outer energy level
B. 4 electrons in their outer energy level
C. 3 electrons in their outer energy level
D. 2 electrons in their outer energy level
13. The alkali metals all have
A. 4 electrons in their outer energy level
B. 3 electrons in their outer energy level
C. 2 electrons in their outer energy level
D. 1 electron in their outer energy level
14. The reason that elements in the same group all have similar chemical properties is
because they all have the same
A. number of protons in the nucleus
B. number of neutrons in the nucleus
C. number of electrons outside the nucleus
D. number of electrons in the outer energy level
15. Which of the following is true for an atom which has atomic number 15 and mass number
31?
Number of Number of Number of
protons
neutrons
electrons
A
15
16
15
B
15
15
16
C
16
31
15
D
15
31
15
16. Which of the following is true for an atom which has atomic number 17 and mass number
35?
Number of Number of Number of
protons
neutrons
electrons
A
18
35
17
B
17
18
17
C
17
35
17
D
17
18
18
Atomic Structure Revision
17. Which of the following is true for an atom which has 6 protons, 8 neutrons and 6
electrons?
Atomic number
Mass number
A
6
12
B
8
12
C
6
14
D
6
8
18. Which of the following is true for an atom which has 29 protons, 34 neutrons and 29
electrons?
Atomic number
Mass number
A
29
34
B
29
63
C
34
63
D
34
29
26
19 Which of the following is true for an atom represented by 12 Mg ?
Atomic number
Mass number
A
12
26
B
14
26
C
26
14
D
12
14
206
20. Which of the following is true for an represented by 82 Pb ?
Number of
Number of
Number
protons
neutrons
of
electrons
A
82
124
124
B
82
82
124
C
124
82
124
D
82
124
82
81
21. An atom can be represented by 35 Br
Its electron arrangement is
A. 2.8.18.7
B. 2.8.18.32.18.3
C. 2.8.7
D. 2.8.18.18.7
22. An atom has atomic number 8 and mass number 18. Its electron arrangement is
A. 2.4
B. 2.6
C. 2.8
D. 2.8.8
23. An atom of an element has an electron arrangement of 2.8.14.2
The atomic number of the element is
A. 24
B. 26
C. 56
D. impossible to say
Atomic Structure Revision
24. Which of the following is an isotope of
37
17 Cl ?
Number of
Number of
protons
neutrons
A
18
37
B
17
20
C
18
17
D
17
18
25. Which of the following is an isotope of
54
26 Fe ?
Number of
Number of
protons
neutrons
A
26
30
B
25
56
C
24
54
D
26
28
26. Which of the following is an isotope of
79
35 Br ?
Atomic number
Mass number
A
36
79
B
79
37
C
35
81
D
36
81
27. Isotopes are atoms with
A. the same number of protons but different numbers of neutrons
B. the same number of protons but different numbers of electrons
C. the same number of neutrons but different numbers of protons
D. the same number of neutrons but different numbers of electrons
28. The only difference between two isotopes of a particular element is
A. their atomic numbers
B. their electron arrangements
C. the number of neutrons in their nuclei
D. the number of protons in their nuclei
29. Which of the following is not the same for two isotopes of a particular element?
A. Atomic number
B. Chemical properties
C. Mass number
D. Electron arrangement
30. Which of the following statements about the relative atomic mass of an element is not
true?
A. It is the average mass of an atom of that element
B. It has no units
C. It is measured relative to carbon-12
D. It is always a whole number

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