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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 are commonly found in nature.
B
Mixtures have two or more components.
C
Solids, liquids, and gases can form mixtures.
D
Each substance in a mixture keeps most of its characteristic properties.
2) What two elements make up common table salt?
A
Chlorine and sodium
B
Sodium and oxygen
C
Sodium and hydrogen
D
Chlorine and hydrogen
3) Which one of the following substances is not a mixture?
A
Gasoline
B
Air
C
Water
D
Chex mix
4) Which of the following sets of substances represents mixtures only?
A
Brass, seawater and air
B
Air, blood and sodium chloride
C
Orange juice, sodium and hydrogen
D
Gold, carbon and air
5) How many atoms are there in a molecule of CH4?
A
5
B
3
C
4
D
2
6) Where two or more substances are mixed together but not chemically combined, this substance is called
A
a molecule
B
an atom
C
a compound
D
a mixture
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
Table salt is a mixture and carbon is a compound.
D
Carbon is a mixture and air 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
False
B
True
9) Which one of the following statements is correct?
A
Water is an element and nitrogen is a compound.
B
Water is a compound and nitrogen is an element.
C
Water and nitrogen are both elements.
D
Water and nitrogen are both compounds.
10) The smallest part of a compound which still has the properties of that compound is called
A
a molecule
B
an atom
C
a mixture
D
a solid
11) Italian Salad Dressing is a . . .
A
homogeneous mixture
B
Compound
C
Pure Substance
D
heterogeneous mixture
12) A mixture that appears to be evenly mixed throughout:
A
a homogeneous mixture
B
a compound
C
a heterogeneous mixture
D
an atom
13) Which of the following substances is a compound?
A
Helium
B
NaCl
C
Oxygen
D
Copper
14) Mixtures are separated through ___________changes.
A
Mixture
B
Compound
C
Physical
D
Chemical
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
Compound
B
Element
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
Yes there are a couple
B
No because only elements are on the periodic table
C
Yes there are many
D
No but mixtures are found on the periodic table
20) Which of the following is not a compound?
A
Cl
B
NaCl
C
HCl
D
CO2
*select an answer for all questions
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