1.

Which graph of Moseley suggests that properties of elements depend upon atomic number?

Answer»

`v^(2) to Z `
`sqrt v to Z`
`v^(2) to A`
`sqrt v to A`

Solution :In 1913, the English physicist Henery Moseley observed regularity in the characteristics of X-ray spectra of elements. He plotted graph `sqrt v ( v =` frequency of X-ray) against atomic number, which was found to be a straight LINE. This indicated that atomic number was the fundamental PROPERTY and not the atomic weight.
As a result periodic law of Mendleev was corrected by putting the word atomic number. instead of .atomic weight. "The physical and CHEMICAL PROPERTIES of elements are periodic function of their atomic numbers" is modern periodic law.


Discussion

No Comment Found