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WorksheetsCHEMISTRY ONLINE TEST 1: PERIODIC TABLE OF ELEMENT
Total questions: 40
Worksheet time: 48mins
1.How are the elements arranged in the Periodic Table?
By increasing in proton number
By increasing in atomic mass
By increasing in nucleon number
By increasing in number of neutron
2. State the sub-atomic particles.
Proton
Neutron
Electrons
Shells
3. Why is an atom neutral?
4. Define compound
5. Explain briefly the difference between atom and molecule?
6. You are given element X. What should you do to identify the element?
7. When a substance undergoes chemical changes, what will probably happened?
Smells or aroma can be detected
Colour changes
Change in shapes
Formation of gas
8. Which of this is physical changes?
Iron become rusting.
Frying an egg
Burning of paper
Marble that had been crushed
9. When iron filings is heated with sulphur powder, a black of iron sulphide is formed. When magnet is brought near to the iron sulphide, the iron filings cannot be separated. Based on the observation, the formation of iron sulphide was physical changes or chemical changes?
Physical changes
Chemical changes
10.Explain why chemical changes happened?
11.Ah Leong is a manager of one pump station in Pahang. Last week there was a flesh flood occur that causes water entering the saving petrol tank. Suggest how could you help Ah Leong to separate between water and petrol.
12.Sodium is in Group 1 of the Periodic Table. Write down the chemical symbol for sodium.
carbon + oxygen → .............. + heat
13. Complete the word equation above:
.................+ ..................→ Sodium chloride (salt)
14. Complete the word equation above:
(a)
15.M (a) is the only metal that is a liquid at room temperature.
16.G (a) is the only non-metal that is a good conductor of electricity.
17.The diagram shows a model of an atom of an element.
Name the part of the atom labelled X.
18.Describe how can you tell that the element is in Group 4 of the Periodic Table. Use information from the diagram.
19.The diagram shows the structure of copper chloride. Describe how can you tell from the diagram that copper chloride is a compound.
20.Chlorine is a non-metal. Tick (/) the correct sentences.
Chlorine is a solid at room temperature because it has high melting point.
Chlorine conducts electricity because its molecules are close together.
Chlorine is a gas at room temperature because it has low boiling point.
Chlorine conducts heat because its molecule are far apart.
21.Which diagram shows one element made of single atoms?
22.Which diagram shows one compound made of molecules?
23.Which diagram shows a mixture of an element and a compound?
24.Copper is a metal. Tick (/) the boxes next to the two properties of copper
Copper conducts electricity.
Copper does not conduct heat.
Copper has a low boiling point.
Copper is ductile.
Copper is not malleable.
The number of valence electrons an element has is equal to its:
Period number
Group number
Valence number
Atomic number
The vertical columns on the periodic table that have common properties are called
Groups
Periods
Shells
Valences
Hydrogen is a:
Alkali metal
Metalloid
Non-metal
Noble gas
What are the elements found along the "staircase" called? They have properties of both metals and non-metals.
Metalloids
Non-metals
Transition metals
Metals
What are the elements in groups 3-12 of the periodic table called?
Transition metals
Non-metals
Metalloids
Metals
What are the elements in group 17 of the periodic table called?
Alkali metals
Alkaline earth metals
Halogens
Noble gases
What are the elements in group 18 (the far right) of the periodic table called?
Alkali metals
Alkaline earth metals
Halogens
Noble gases
What are the elements in group 2 of the periodic table called?
Alkali metals
Alkaline earth metals
Halogens
Noble gases
What are the elements in group 1 (the far left) of the periodic table called?
Alkali metals
Alkaline earth metals
Halogens
Noble gases
Which of these is not a sign of chemical change?
Bubbles
Color change
Melting
Bad smell
How many neutrons does Carbon have?
6
8
12
18
A pure substance that cannot be broken down into another kind of matter through physical or chemical means.
element
compound
period
group
Which properties most accurately describe the element Krypton (Kr)?
Highly reactive
Ductile
Weak conductor of electricity
Has 8 valence electrons
Brittle and dull
Identify the unknown atom.
Flourine
Beryllium
Boron
Helium
