Who noticed that the periodic table was arranged in order of atomic mass, where every eighth element had similar properties, and called this the law of octaves?
A) Meyer
B) Newlands
C) Moseley
D) Mendeleev
E) Thomson
Correct Answer:
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Q8: Mendeleev proposed the existence of an unknown
Q9: The chief contribution of physicist Henry Moseley
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Q11: Which element would be expected to have
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Q15: Which of these elements exhibits chemical behavior
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