In 1661, who developed a definition of element that made the concept subject to laboratory investigation?
A) Berzelius
B) Boyle
C) Lavoisier
D) Davy
Correct Answer:
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Q30: What scientist discovered more elements than any
Q31: A gold-plated (gold-covered) piece of jewelery, such
Q32: The symbol for lead is
A) Pb.
B) La.
C)
Q33: Solutions are
A) homogeneous mixtures.
B) heterogeneous mixtures.
C) nonuniform
Q34: The symbol for Erbium is
A) Er.
B) Yb.
C)
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Q37: What was the nationality of the first
Q38: A metal alloy, such as steel, is
A)
Q39: The symbol for oxygen is
A) Ox.
B) On.
C)
Q40: A bubble-producing soda is an example of
A)
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