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