In Mendeleev’s periodic table, all 63 elements were arranged in an increasing order of their atomic masses. The serial or ordinal number of an element in the increasing order of atomic mass was referred to as its atomic number.
Mendeleev’s periodic table consisted of vertical groups and horizontal series (now called periods).
Elements belonging to the same group showed similar properties.
Properties of elements in a series/period showed gradual variation from left to right.
Mendeleev’s periodic table was readily accepted by scientific community due to the following advantages:
i. Mendeleev had left some gaps corresponding to certain atomic numbers in the periodic table so as...
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...
Correct option is: (A) atomic weights
According to Mendeleev's periodic law, the Physical and Chemical properties of elements are the periodic function of their atomic weight
The Modern periodic table removed various anomalies of Mendeleev’s periodic table as follows:
i. All isotopes of the same element have different atomic masses but same atomic number. Therefore, they occupy...