The scientist who first established the relative masses of different elements was
A) Mendeleev.
B) Maxwell.
C) Priestley.
D) Dalton.
Correct Answer:
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Q11: The largest number of elements are classed
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
Q17: The metals most difficult to extract from
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
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