Chapter 2 Matter and Atomic Structure
1. Which of the following takes place during freezing?
A. Liquid particles move slower and further apart.
B. Liquid particles move faster and further apart.
C. Liquid particles move slower and closer together.
D. Liquid particles move faster and closer together.
2. The table shows the electrical charge of electron, proton and neutron. Which of the following
is correct?
Electron
Proton
Neutron
A.
Positive
Negative
Neutral
B.
Negative
Positive
Positive
C.
Negative
Positive
Neutral
D.
Neutral
Negative
Positive
3. Which of the following statements about electrons is not true?
A. Electrons move at approximately the speed of light.
B. Electrons are subatomic particles that make up the mass of an atom.
C. Electron present in an atom of metal help to conduct electricity.
D. The chemical properties of an atom are dependent on the number of valence electron.
4. “He proposed that the electrons in an atom move in shells around the nucleus.”
Who is ‘he’ mentioned above?
A. John Dalton
B. Neil Bohr
C. James Chadwick
D. Ernest Rutherford
5. Who discovered neutrons?
A. Neil Bohr
B. J.J. Thomson
C. James Chadwick
D. Ernest Rutherford
6. Which of the following is not a statement of Dalton’s Atomic Theory?
A. All matter consists of tiny particles know as atoms.
B. Atoms cannot be divided into simpler particles.
C. Atoms can be created or destroyed.
D. Atoms of the same element are the same but atoms for different elements are different.
7. Where are the electrons found in the Rutherford model of the atom?
A. Found inside the nucleus
B. Found outside of the nucleus
C. There are no electrons in the Rutherford Model
D. Electrons are found both inside and outside of the nucleus
8. The electron arrangement of atom X is 2.8.7 and it has 15 neutrons in its nucleus. What is the
nucleon number of atom X?
A. 31
B. 32
C. 17
D. 15
9. The diagram shows the atomic symbol of element X.
23
11𝑋
Which of the following is true about the subatomic particles of element X?
A.
B.
C.
D.
Proton number
11
23
23
11
Nucleon number
23
11
23
11
10. Which of the following statements about calcium atom and calcium ion is correct?
A. They have the same chemical properties.
B. They have the same number of protons.
C. They have the same number of electrons.
D. A calcium atom gains two electrons to form a calcium ion.
11. Diagram below shows the standard representation of nitrogen atom.
What is the number of valence electron of the atom?
A. 5
B. 7
C. 10
D. 14
14
7𝑁
12. Diagram below shows an electron arrangement for boron atom.
Choose the correct number of valence electron for the boron atom.
A. 2
B. 3
C. 5
D. 6
13. Isotopes of an element have the same proton number but they have different number of ____.
A. neutron
B. electron
C. nucleus
D. valence electron
14. Which of the following represents the isotope of chlorine-37?
Proton number
Composition
A.
17
37p, 17n
B.
17
37p, 18n
C.
17
17p, 20n
D.
17
17p, 37n
15. A patient is diagnosed of having thyroid cancer. Which of the following isotopes can be used
to treat the patient?
A. Carbon-14
B. Sodium-14
C. Phosphorus-32
D. Iodine-131
16. Copper, Cu contains two natural isotopes, 69.09% 63Cu and 30.91% 65Cu are 62.9298 and
64.9278 respectively. What is the relative atomic mass of copper?
A. 68.547
B. 63.547
C. 63.647
D. 73.547
17. In the isotope carbon-14, what does the number 14 represent?
A. Mass number of atom
B. Number of neutron
C. Overall charge of atom
D. Percentage of natural abundance of isotope
18. Element P and Q are two isotopes. Which of the following are the differences of elements P
and Q?
I.
Number of proton
II.
Number of neutron
III.
Physical properties
IV.
Chemical properties
A. I,III
B. I,IV
C. II,III
D. II,IV
19. Table below shows the boiling point and melting point of substance P, Q R and S.
Substance
Boiling point / C
Melting point / C
P
265
198
R
165
50
Q
78
12
S
17
8
Which substance is a liquid at room temperature?
A. P
B. Q
C. R
D. S