A distinct substance composed of two or more elements combined chemically in a definite proportion by mass is a
A) homogeneous mixture.
B) heterogeneous mixture.
C) solution.
D) compound.
Correct Answer:
Verified
Q24: The charge of a cation is
A)positive.
B)negative.
C)neutral.
Q25: The charge of an anion is
A)positive.
B)negative.
C)neutral.
Q26: Which is a compound?
A)Air
B)Lead
C)Water
D)Iron
Q27: The number of nonmetallic atoms in Al2(SO3)3
Q28: Which represents an element?
A)CO
B)NI
C)N2
D)OS
Q30: Co is the symbol for
A)Copper
B)Carbon
C)Cobalt
D)Carbon monoxide
Q31: Which would you classify as a semiconductor?
A)Diamond
B)Silicon
C)Lead
D)Copper
Q32: How many different elements are present in
Q33: How many different elements are present in
Q34: What is the total number of hydrogen
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