Question

Which of the following statements best describes how Moseley's research affected the periodic table?

It became organized by each element's name instead of its symbol.
It became organized by atomic mass instead of atomic number.
It became organized by atomic number instead of atomic mass.
It became organized by each element's symbol instead of its name.

Answer 1

It became organized by atomic number instead of atomic mass.

Step-by-step explanation:

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Answer 2

It became organized by atomic number instead of atomic mass.

Step-by-step explanation:

Mosley used the cathode ray tube and fired a beam of electrons at different elements in his list from 1 being hydrogen and 92 being Uranium. He analyzed the x-ray spectrum produced and concluded that the frequency of the x-ray generated by the metal depended on its position in the list. He assigned this position as the atomic number of the element. He explained that the atomic number is a whole number and not a fraction, atomic number is positively charged and that elements in the periodic table should be placed based on their atomic number and not atomic mass.