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- 1. Multiple Choice
What are the elements in group 18 (the far right) of the periodic table called?
Alkali metals
Alkaline earth metals
Halogens
Noble gases
- 2. Multiple Choice
Diagram shows the symbol of neon. Which statements is not true about neon?
Neon exist as a monatomic elements
Neon has low melting and boiling point
Neon has a low density
Neon reacts with bromine to form a covalent compound
- 3. Multiple Choice
A construction worker wants to weld two pieces of iron together during the construction of a tall building. Which of the following elements, J, L, M or Q, is the most suitable to be used to provide an atmosphere which can prevent the hot iron from reacting with oxygen in the air during welding?
- 4. Multiple Choice
Which property of Group 18 elements increases when going down the Group in the Periodic Table?
Forces of attraction
Reactivity
Solubility in water
Electrical conductivity
- 5. Multiple Choice
The symbol for helium is
H
He
Hl
Hm
- 6. Multiple Choice
The symbol for argon is
Ar
Ag
An
A
- 7. Multiple Choice
The Alkali Metals = Group 1
The Halogens = Group 17
The Noble Gases = Group 18
The Alkaline Earth Metals = Group 2
- 8. Multiple Choice
Helium is a good insulator. Why?
Helium do not contains mobile ions
Helium do not contains mobile electrons
Helium is not inert
Helium is light
- 9. Multiple Choice
Why is Helium used in divers' tank but not hydrogen gas?
Helium is lighter than hydrogen
Helium is inert to any chemical reactions
Helium is cheaper
Helium is easy to get from market
- 10. Multiple Choice
Argon (proton number =18) is inert to any chemical reaction because
It is light
it is located in Group 18
it has achieved stable duplet electron arrangement
it has achieved stable octet electron arrangement
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