What was the nationality of the first persons who we know speculated about "elements"?
A) Chinese
B) Egyptian
C) Greek
D) Roman
Correct Answer:
Verified
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)
Q35: In 1661, who developed a definition of
Q36: Living next to a lake near volcanic
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)
Q41: Diamond, graphite, and buckyballs are
A) isotopes.
B) allotropes.
C)
Q42: About 75% of the mass of the
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