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Physical Science 5-1
Test Description: Chemistry review of compounds and molecules
Instructions: Answer all questions to get your test result.
1) Which of the following is a compound ?
A
air
B
salt
C
paint
D
soup
2) One molecule of SiO2 contains the following combinations of atom:
A
2 Si and 2 O
B
1 Si and 1 O
C
1Si and 2 O
D
2 Si and 1 O
3) Which of the following models could be used to compare the sizes of atoms in molecule ?
A
structural
B
space filling
C
formula
D
ball and stick
4) There are strong bonds between the atoms in a piece of quartz. These bonds give quartz a
A
low melting points
B
high molecular mass
C
low molecular mass
D
high melting points
5) The attraction between molecules tends to be _____ the attraction between ions.
A
weaker than
B
none of these
C
equal to
D
stronger than
6) Which molecules are most strongly attracted to one another?
A
hydrogen molecules
B
water molecules
C
oxygen molecules
D
nitrogen molecules
7) Sugar has a lower melting point than salt because sugar is made of
A
crystals
B
molecules
C
atoms
D
ions
8) Which of the following does not form crystals at room temperture?
A
water
B
quartz
C
sand
D
salt
9) Which of the following is a mixture ?
A
oxygen
B
sugar
C
soil
D
pure water
10) A chemical formula formula shows
A
numbers and types of atoms
B
chemical properties
C
mass of atoms
D
number of atoms only
*select an answer for all questions
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