The metals most difficult to extract from their ores in general
A) are the least active chemically.
B) are the most active chemically.
C) have the lowest atomic numbers.
D) have the highest atomic numbers.
Correct Answer:
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Q12: Carbon
A) is a typical metal.
B) is a
Q13: At room temperature, bromine is a
A) colorless
Q14: According to the periodic table, the chemical
Q15: Which of the following is a homogeneous
Q16: The scientist who first established the relative
Q18: Which of the following is a compound?
A)
Q19: Of the halogens, at room temperature and
Q20: The most active of the following metals
Q21: An atom whose outer electron shell lacks
Q22: A bonding molecular orbital
A) always consists of
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