Give reason: Mendeleev’s periodic law was modified into modern periodic law.

Question

Give reason:

Mendeleev’s periodic law was modified into modern periodic law.

Monjur Alahi

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2025-01-04 04:42

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Mention features of Mendeleev’s periodic table.

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Mendeleev’s periodic table had …………… elements.

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Salim Ahmed Kawsar · Accepted Answer · 2023-02-05T15:29:48+06:00

Henry Moseley in 1913, studied X-ray spectra of large number of elements.
He observed that the frequency of X-ray emitted from an element is related to atomic number (Z) of an element and not its atomic mass.
Therefore, the atomic number, Z, was considered as more fundamental property of the atom than the atomic mass.
As a result, Mendeleev’s periodic law was modified.