Page 23 - Spotlight A+ Form 4 & 5 Chemistry KSSM

Form
4
Chapter 5 Chemical Bond Chemistry
Section C
SPM Clone
23
16
5. (a) J and L are symbols of two atoms.
11
8
Explain how atoms J and L can form ions and write the formulae of the ions formed. C4 [4 marks]
(b) Figure 5 shows the electron arrangement of a molecule PQ . These letters are not the actual symbols of
3
the elements.
Q P Q

Q
Figure 5
Based on Figure 5, write the electron arrangements of the atoms of element P and element Q. Explain the
position of element P in the Periodic Table of Elements. C2 [6 marks]
(c) Table 5 shows the electron arrangements of atoms W, X and Y. These letters are not the actual symbols
of the elements.

Element Electron arrangement
W 2.4
X 2.6
Y 2.8.2
Table 5
Using the information in Table 5, explain how two compounds can be formed by these elements based
on their electron arrangements. The two compounds should have different types of bond. C3
[10 marks]

Reinforcement & Assessment of Science Process Skill
CHAP. ©PAN ASIA PUBLICATIONS CHAP.
5 Reinforcement exercise of science process skills in preparation for Paper 3 (Practical Test). 5

In this experiment you are required to conduct an experiment to study the electrical conductivity of substances
M1 and M2 in solid and molten states.
You are provided with the following materials:
M1 = Solid compound X
M2 = Solid compound Y

Batteries Bulb
Switch

Carbon
electrodes
Solid M1

Figure 1
Carry out the experiment according to the following instructions:
1. Fill a crucible with M1 until half full.
2. Set up the apparatus as shown in Figure 1.
3. Turn on the switch and observe the brightness of the light bulb. Record the observation in Table 1.

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