Long Form of Periodic Table
Long Form of Periodic Table: Overview
This topic explains the contribution of Neil Bohr in figuring out the limitations of modern periodic table. It also discusses how the periodic table was reconstructed into the long form of periodic table.
Important Questions on Long Form of Periodic Table
The elements A, B, C, D and E have atomic number and respectively. Which pair of elements belong to the same group?
Give an account of the process adopted by "Mendeleev for the classification of elements". How did he arrive at the "Periodic Law"?
Which group of elements could be placed in Mendeleev’s periodic table without disturbing the original order? Give reason.
(i) State the law of octaves,
(ii) Name the scientist who framed the above law.
(iii) Two elements A and B obey the law of octaves. How many elements are in between A and B?
(j) What is the achievement of Dobereiner’s law of triads?
(ii) What were the reasons for rejecting this classification?
and . From the list of elements given above make three triads and name the family of each triad,
Why is there a necessity for the classification of elements? Give at least two reasons.
