1. Name:__________________________________________ Form: 4 ST
QUIZ 1
[40 marks]
Answer all questions in 60 minutes.
Particle No of Protons Number of neutrons Number of
(zarah) (Bilangan Proton) (Bilangan neutron) Electrons
(Bilangan elektron)
V 3 4 2
W 6 6 6
X 11 12 10
Y 17 18 18
Z 18 20 18
Table 1
1. Table 1 shows the number of proton, neutron and electron for particle V, W, X, Y and Z.
based on information given in Table 1, answer the following questions.
a. What is the charge for particle X?
___________________________________________________________
[1 m]
b. What is the nucleon number for particle W?
___________________________________________________________
[1 m]
c. Write the electron arrangement for atom
V : _____________________
Z : _____________________
[2 m]
d. Draw the electron arrangement for particle
(i) X [1 m]
(ii) Y [1 m]

2. S+ J
M2+ Z
Diagram 1
2. Diagram 1 shows electrons arrangement for deferens 4 particles.
a) State the number of protons for the particles below :
(i) M : ____________________
(ii) J : ____________________
[2 m]
b) Write the electron arrangement for atom S
____________________________________________________________________
[1 m]
c) Write the electron arrangement when J particle is stable
____________________________________________________________________
[1 m]
3 (a) Diagram 1.1 shows the set up of the apparatus used in anexperiment to determine the
freezing point of substance X.
Thermometer
Termometer
Boiling tube
Tabung didih
Conical flask
Kelalang kon
Substance X
Bahan X
Diagram 1.1
(i) Name one example of substance X.
…………………………………………………………………………………
[1 mark]
(ii) Why is the boiling tube must be placed in a conical flask?
…………………………………………………………………………………
[1 mark]

3. (iii)Why is the substance X must be stirred continously during cooling
process?
……………………………………………………………………………….
[1 mark]
(b) Diagram 1.2 shows a graph of temperature against time when
substance X is cooled.
o
Temperature / C
o
Suhu/ C
90 A
B
80
60 C
Time/min
Masa /min
Diagram 1.2
(i) What is the freezing point of substance X?
………………………………………………………………………………
[1 mark]
(ii) State the physical state of substance X at point B.
……………………………………………………………………………....
[1 mark]
(iii)Compare the kinetic energy of particles at points A and B.
………………………………………………………………………………
[1 mark]
(iv) Why does the temperature remains constant at point B?
………………………………………………………………………………....
[1 mark]
(v) Draw the arrangement of particles of substance X at 60oC and 90oC.
60oC 90oC
[2 marks]
4. Table 2 shows the number of protons and neutrons of four atoms.

4. Atom Number of protons Number of neutrons
W 3 4
X 16 17
Y 16 16
Z 19 20
Table 2
a) (i) What is meant by the proton number and nucleon number of an atom?
...........................................................................................................................
…………………………………………………………………………………
[2 marks]
ii) State the proton number and nucleon number of atom W.
......................................................................................................................
[1 mark]
b) Represent atom X in the form of
[1 mark]
(c) Matter can be divided into three particles; that are atoms, molecules and
ions. Give an example of each particle and explain the meaning of
Jirim boleh dibahagikan kepada tiga jenis zarah; iaitu atom, molekul dan
ion. Berikan satu contoh bagi setiap zarah dan terangkan apakah yang
dimaksudkan dengan
(i) atom
atom
(ii) ion
ion
(iii)molecule
molekul
[6 marks]
5. The meeting point of Substance R was determined by using the heating method. The

5. graph of temperature against time was plotted as shown below.
Takat lebur sebatian J ditentukan menggunakan kaedah pemanasan. Graf suhu melawan
masa diplotkan seperti di bawah
Temperature/ oC
90
80
70
60
50
40
30
Time/minute
5 10 15 20 25 30 35
Figure 1
(a) (i) What is the melting point of Substance R with reference to the figure 1.
…………………………………………………………………………………………
[1 marks]
(ii) Draw and label the set-up of apparatus for heating process.
[2 marks]
(b) State the physical state of Substance R at the section of the curve

6. ( i) 0 to 5 minutes
……………………………………………………………………....................
(ii) 10 to 20 minutes
………………………………………………………………….........................
[2 marks]
(c) Explain why there is no change in the temperature from the10th to 25th minutes.
……………………………………………………………………………………………...
[2 marks]
(d) Draw a diagram to show the arrangement of particles R at a temperature of 80oC.
[1mark]
(e) Explain why the melting point of substance R cannot be determined by method of
heating it directly?
………………………………………………………………………………………...…
[ 1 mark]
(f) A compound S has a melting point of -14oC and a boiling point of 124oC, what is the
physical state of S at a temperature of 135oC?
……………………………………………………………………………………………
[ 1 mark]
(g) What is isotope?
..............................................................................................................................................
[1 mark]
[End of Question Paper]