GRADE LEVEL 8
5 Which table correctly identies each group and its characteristic properties?
Group
Physical Properties
1
• High electronegativity
• Melting points increase down the group
• Seven valence electrons
• Highly reactive
2
• Soft, silvery, and corrosive
• Good electrical/thermal conductors
• One valence electron
• React violently with water
17
• Silvery-white, malleable, ductile, hard
• Found in nature as compounds
• Two valence electrons
• Not as reactive
18
• High electronegativity
• Boiling points increase down the group
• Eight valence electrons
• Virtually nonreactive
2
• Soft, silvery, and corrosive
• Good electrical/thermal conductors
• One valence electron
• React violently with water
17
• High electronegativity
• Boiling points increase down the group
• Eight valence electrons
38 A topographic map of a coastal region is shown below.
• Virtually nonreactive
18
• High electronegativity
• Melting points increase down the group
• Seven valence electrons
• Highly reactive
Chemical Properties
0
1
• Soft, silvery, and corrosive
• Good electrical/thermal conductors
• One valence electron
• React violently with water
2
• Silvery-white, malleable, ductile, hard
• Found in nature as compounds
• Two valence electrons
• Not as reactive
17
• High electronegativity
• Melting points increase down the group
• Seven valence electrons
• Highly reactive
18
• Low melting and boiling points
• Colorless and odorless
• Eight valance electrons
• Virtually nonreactive
20
iv
Physical Properties
300
1
Group
�
Chemical Properties
• Two valence electrons
• Not as reactive
R
�
Physical Properties
• Silvery-white, malleable, ductile, hard
• Found in nature as compounds
er
Group
100
�
Chemical Properties
0
20
Based on the topographic map, what is the elevation difference in meters between Location A and
Location C?
Group
�
Physical Properties
Chemical
Properties
Record
your answer and fill in the bubbles on the grid below. Be sure to use the correct place
1
• Silvery-white, malleable, ductile, hard
• Found in nature as compounds
value.
• Two valence
electrons
• Not as reactive
2
• Soft, silvery, and corrosive
• Good electrical/thermal conductors
• One valence electron
0
0 0 0
• React violently
with water0
0
• High electronegativity
• Melting points increase down the group
• Seven valence electrons
2
2 2 2
• Highly reactive
1
1
2
2
• High electronegativity
• Boiling points increase down the group
• Eight valence
4
4 electrons
4 4
• Virtually nonreactive
5
5 5 5
3
3
4
4
5
5
17
18
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GO9 ON
ILLEGAL TO COPY
39 The diagram below shows an open electrical circuit.
KEY
Closed switch
Open switch
Battery
Bulb
When the open switch is first closed, which energy transformations occur?
→ mechanical → thermal
→ thermal → light
Chemical → electrical → light
Thermal → chemical → mechanical
� Chemical
� Electrical
�
�
Page 78
GO ON
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LEVEL 8 | FORM B
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