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Chemistry — Second Secondary

Chemistry — Second Secondary

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Chemistry — Second Secondary 2026/2027

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Quiz

Chapter 2 — Atomic Structure — Picture questions (exam style)

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  • Questions count: 12
  • Passing grade: 60%
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1.
The figure shows the electron arrangement of an atom in its main energy levels. Which option is correct?
The figure shows the electron arrangement of an atom in its main energy levels. Which option is correct?
element C (Z = 6), period 4, group 2
element C (Z = 6), period 3, group 4
element C (Z = 6), period 2, group 14
element N (Z = 7), period 3, group 4
2.
The chart shows the natural abundances of the two isotopes of Cl. What is the average atomic mass?
The chart shows the natural abundances of the two isotopes of Cl. What is the average atomic mass?
35.5
63.51
36
36.5
3.
The chart shows the natural abundances of the two isotopes of Ga. What is the average atomic mass?
The chart shows the natural abundances of the two isotopes of Ga. What is the average atomic mass?
69.5
70
120.9
70.5
4.
The figure shows the electron arrangement of an atom in its main energy levels. Which option is correct?
The figure shows the electron arrangement of an atom in its main energy levels. Which option is correct?
element Ar (Z = 18), period 4, group 1
element Ca (Z = 20), period 1, group 4
element K (Z = 19), period 4, group 1
element Ar (Z = 18), period 5, group 1
5.
The chart shows the natural abundances of the two isotopes of Li. What is the average atomic mass?
The chart shows the natural abundances of the two isotopes of Li. What is the average atomic mass?
6.8
6.5
11.83
6.2
6.
The figure shows the electron arrangement of an atom in its main energy levels. Which option is correct?
The figure shows the electron arrangement of an atom in its main energy levels. Which option is correct?
element S (Z = 16), period 7, group 3
element Cl (Z = 17), period 3, group 17
element S (Z = 16), period 3, group 17
element Ar (Z = 18), period 7, group 3
7.
The chart shows the natural abundances of the two isotopes of B. What is the average atomic mass?
The chart shows the natural abundances of the two isotopes of B. What is the average atomic mass?
17.84
10.5
10.75
10.25
8.
The chart shows the natural abundances of the two isotopes of Br. What is the average atomic mass?
The chart shows the natural abundances of the two isotopes of Br. What is the average atomic mass?
79.8
79.5
80
80.2
9.
The figure shows the electron arrangement of an atom in its main energy levels. Which option is correct?
The figure shows the electron arrangement of an atom in its main energy levels. Which option is correct?
element Ne (Z = 10), period 3, group 7
element Ne (Z = 10), period 7, group 2
element F (Z = 9), period 3, group 7
element F (Z = 9), period 2, group 17
10.
The chart shows the natural abundances of the two isotopes of Li. What is the average atomic mass?
The chart shows the natural abundances of the two isotopes of Li. What is the average atomic mass?
6.08
6.92
6.5
10.58
11.
The figure shows the electron arrangement of an atom in its main energy levels. Which option is correct?
The figure shows the electron arrangement of an atom in its main energy levels. Which option is correct?
element S (Z = 16), period 6, group 3
element S (Z = 16), period 3, group 16
element Cl (Z = 17), period 4, group 6
element P (Z = 15), period 6, group 3
12.
The chart shows the natural abundances of the two isotopes of Li. What is the average atomic mass?
The chart shows the natural abundances of the two isotopes of Li. What is the average atomic mass?
13.71
6.5
11.31
16.12
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