Question

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.

Answer 1

Answer:the answer c

Explanation: because he believes that properties of elemets are periodic function of there atomic number