Chemistry X | Periodic Classification of Elements | THE MODERN PERIODIC TABLE
THE MODERN PERIODIC TABLE In 1913, Henry Moseley showed that the atomic number of an element is a more fundamental…
Chemistry X | Periodic Classification of Elements | Limitations of Mendeléev’s Classification
Limitations of Mendeléev’s Classification Electronic configuration of hydrogen resembles that of alkali metals. Like alkali metals, hydrogen combines with halogens,…