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WorksheetsG8_Chemistry_Term1_Revision Worksheet
Total questions: 25
Worksheet time: 2hrs 5mins
The fluoride ion (F-) have the same electronic structure as ...............
neon
helium
argon
nitrogen
Rubidium forms an ion with charge of ......
1 +
2 +
1 -
2 -
Magnesium reacts with chlorine to form magnesium chloride.
Which statement describes what happens to magnesium atoms in this reaction?
Magnesium ions lose electrons to form positive charges.
Magnesium atoms gain 3 electrons to form positive ions.
Magnesium ions gain 2 electrons to form positive ions.
Magnesium atoms lose 2 electrons to form positive ions.
sodium and chlorine react together to form sodium chloride.
During formation, each sodium atom …1… one …2… which is completely …3… to the chlorine atom.
What words correctly fill gaps 1, 2 and 3?
A
B
C
D
Write the electronic structure of Al3+ ion.
2,8,3
2,8
2,7
2,8,6
How many oxygen atoms are present in the chemical formula? 2Mg2CO3
3
6
5
3
A compound contains one atom of magnesium and 2 atoms of chlorine.
Chemical formula of compound is
A / Mg2Cl
B / MgCl2
C / MgC2
D / Mg2C
What is the formula of calcium hydroxide?
A / Ca(OH)2
B / Ca2OH
C / CaOH
D / CaOH3
valency of nitrogen is
0
1
2
3
Which is the atomic structure of calcium?
2,8
2,8,8,2
2,8,2
2,8,8,1
Draw a diagram showing the arrangement of the valence electrons in one molecule of the covalent compound Ammonia (NH3).
Use o (dot) to represent an electron from a nitrogen atom.
Use x (cross) to represent an electron from a hydrogen atom.
A
B
Draw a diagram showing the arrangement of the valence electrons in one molecule of the ionic compound aluminium fluoride.
Use o (dot) to represent an electron from a aluminium atom.
Use x (cross) to represent an electron from a fluorine atom.
A
B
What structure is shown in diagram A
Diamond
Graphite
Which one is the harder substance?
Diamond
Graphite
Used for cutting tools
Diamond
Graphite
used as a lubricant
Diamond
Graphite
Good conductor of electricity
Diamond
Graphite
It has a week forces of attraction between the layers
Diamond
Graphite
A compound contains one atom of calcium, two atoms of hydrogen and two atoms of oxygen.
What is the correct chemical formula of the compound?
CaO2H2
HOCaOH
H2CaO2
Ca(OH)2
Number of electrons in the outer shell of halogens are
1
5
7
8
What is the name of Al(OH)3
Aluminum (III) hydroxide
Aluminum trihydroxide
Aluminum oxygen trihydride
Aluminum hydroxide
K2CO3
Potassium Carbonate
Sulfuric Acid
Potassium Chloride
Magnesium Sulfate
Find
Proton number
15
16
31
2,8,5
Find
Neuton number
15
16
31
2,8,5
Find
mass number
15
16
31
2,8,5
