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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
soup
C
salt
D
paint
2) One molecule of SiO2 contains the following combinations of atom:
A
1Si and 2 O
B
1 Si and 1 O
C
2 Si 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
formula
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
high melting points
B
low melting points
C
high molecular mass
D
low molecular mass
5) The attraction between molecules tends to be _____ the attraction between ions.
A
none of these
B
equal to
C
weaker than
D
stronger than
6) Which molecules are most strongly attracted to one another?
A
nitrogen molecules
B
water molecules
C
oxygen molecules
D
hydrogen molecules
7) Sugar has a lower melting point than salt because sugar is made of
A
atoms
B
ions
C
crystals
D
molecules
8) Which of the following does not form crystals at room temperture?
A
salt
B
quartz
C
sand
D
water
9) Which of the following is a mixture ?
A
sugar
B
pure water
C
soil
D
oxygen
10) A chemical formula formula shows
A
number of atoms only
B
mass of atoms
C
numbers and types of atoms
D
chemical properties
*select an answer for all questions
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