Chemistry, 19.08.2020 07:01, lizzyhearts

What did Henry Moseley contribute to the modern periodic table? O A. He discovered the lanthanides and actinides.
O B. He identified all of the elements that are currently in the periodic
table.
O C. He ordered the elements based on atomic number.
O D. He ordered the elements based on atomic mass.

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What did Henry Moseley contribute to the modern periodic table? O A. He discovered the lanthanides...