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Elements Mixtures And Compounds
Test Description: Elements Mixtures and Compounds review questions
Instructions: Answer all questions to get your test result.
1) How is a mixture different from a compound?
A
Mixtures have two or more components.
B
Mixtures are commonly found in nature.
C
Each substance in a mixture keeps most of its characteristic properties.
D
Solids, liquids, and gases can form mixtures.
2) What two elements make up common table salt?
A
Chlorine and sodium
B
Sodium and hydrogen
C
Chlorine and hydrogen
D
Sodium and oxygen
3) Which one of the following substances is not a mixture?
A
Air
B
Gasoline
C
Chex mix
D
Water
4) Which of the following sets of substances represents mixtures only?
A
Brass, seawater and air
B
Gold, carbon and air
C
Orange juice, sodium and hydrogen
D
Air, blood and sodium chloride
5) How many atoms are there in a molecule of CH4?
A
5
B
4
C
2
D
3
6) Where two or more substances are mixed together but not chemically combined, this substance is called
A
an atom
B
a mixture
C
a molecule
D
a compound
7) Which of the following statements is correct?
A
Air is a mixture and carbon is a compound.
B
Air is a mixture and table salt is a compound.
C
Carbon is a mixture and air is a compound.
D
Table salt is a mixture and carbon is a compound.
8) The properties of a compound will be the same as the properties of the elements that make up the compound.
A
True
B
False
9) Which one of the following statements is correct?
A
Water and nitrogen are both compounds.
B
Water and nitrogen are both elements.
C
Water is an element and nitrogen is a compound.
D
Water is a compound and nitrogen is an element.
10) The smallest part of a compound which still has the properties of that compound is called
A
an atom
B
a mixture
C
a solid
D
a molecule
11) Italian Salad Dressing is a . . .
A
Compound
B
Pure Substance
C
homogeneous mixture
D
heterogeneous mixture
12) A mixture that appears to be evenly mixed throughout:
A
a heterogeneous mixture
B
an atom
C
a homogeneous mixture
D
a compound
13) Which of the following substances is a compound?
A
Copper
B
Oxygen
C
NaCl
D
Helium
14) Mixtures are separated through ___________changes.
A
Chemical
B
Physical
C
Compound
D
Mixture
15) Two or more materials that combine chemically form a(n) _____________.
A
Liquid
B
Compound
C
Mixture
16) These are found on the Periodic Table.
A
Compound
B
Mixture
C
Element
17) These are written as chemical formulas.
A
Element
B
Compound
C
Mixture
18) These can be homogeneous OR heterogeneous.
A
Elements
B
Mixtures
C
Compounds
19) Are there any compounds on the periodic table?
A
No but mixtures are found on the periodic table
B
Yes there are a couple
C
Yes there are many
D
No because only elements are on the periodic table
20) Which of the following is not a compound?
A
HCl
B
NaCl
C
CO2
D
Cl
*select an answer for all questions
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