Which of the following CANNOT be the chemical symbol for an element?
A) Ca
B) Se
C) B
D) H2
Correct Answer:
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Q61: A mixture of sand and salt is
Q64: _ are pure substances.
A)Homogeneous mixtures and elements
B)Elements
Q71: In the SI system of measurement,the unit
Q74: What is the chemical symbol for iron?
A)Fe
B)I
C)In
D)Ir
Q77: What is the chemical symbol for iodine?
A)I
B)Id
C)In
D)Io
Q78: A solution is another name for a(n)
A)compound.
B)element.
C)heterogeneous
Q80: What is the chemical symbol for chromium?
A)C
B)Cr
C)Ch
D)Cm
Q80: Which of the following represents an element?
A)
Q83: The prefix giga means _.
A)1,000
B)1,000,000,000,000
C)1,000,000
D)1,000,000,000
Q95: How many micrograms are in 20 mg?
A)20,000
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