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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
soup
B
paint
C
salt
D
air
2) One molecule of SiO2 contains the following combinations of atom:
A
2 Si and 2 O
B
1Si and 2 O
C
2 Si and 1 O
D
1 Si and 1 O
3) Which of the following models could be used to compare the sizes of atoms in molecule ?
A
formula
B
structural
C
ball and stick
D
space filling
4) There are strong bonds between the atoms in a piece of quartz. These bonds give quartz a
A
low molecular mass
B
high molecular mass
C
low melting points
D
high melting points
5) The attraction between molecules tends to be _____ the attraction between ions.
A
stronger than
B
equal to
C
none of these
D
weaker than
6) Which molecules are most strongly attracted to one another?
A
nitrogen molecules
B
oxygen molecules
C
hydrogen molecules
D
water molecules
7) Sugar has a lower melting point than salt because sugar is made of
A
crystals
B
atoms
C
molecules
D
ions
8) Which of the following does not form crystals at room temperture?
A
salt
B
water
C
sand
D
quartz
9) Which of the following is a mixture ?
A
pure water
B
sugar
C
soil
D
oxygen
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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