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Elements And Compounds
Test Description: Elements and Compounds
Instructions: Answer all questions to get your test result.
1) Which of the following is an element?
A
Iron
B
Water
C
Air
D
Salt
2) Which of the following is correct?
A
NaCl is an element.
B
Zn is a compound.
C
OH is a compound.
D
S is a compound.
3) Which statement best summarizes the difference between an element and a compound?
A
An element is a mixture, and a compound is a pure substance.
B
An element is two or more pure substances chemically combined, and a compound is a pure substance.
C
An element is a pure substance, and a compound is a combination of elements.
D
An element is two or more compounds, and a compound is two or more elements.
4) Which element is abundant in the Earth's crust?
A
Iron
B
Silicon
C
Aluminum
D
Caron
5) Which elements are abundant in the Earth's oceans?
A
Iron and nickel
B
Silicon and hydrogen
C
Carbon and oxygen
D
Hydrogen and oxygen
6) Which of the following elements are living things made of?
A
Carbon, nickel, iron
B
Silicon, carbon, oxygen, nitrogen
C
Carbon, hydrogen, nitrogen, oxygen
D
Carbon, hydrogen, oxygen
7) NaCl is:
A
salt.
B
water.
C
carbon dioxide.
D
glucose.
8) How many elements are in the chemical formula for glucose, C6H12O6?
A
24
B
3
C
10
D
1
9) The formula for sand is:
A
H2O
B
CO2
C
SiO2
D
NaHCO3
10) All elements are naturally occurring.
A
True
B
False
*select an answer for all questions
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