Write the merits of Mendeleev periodic table.
Answers
Answered by
39
---> Made the study of chemistry much more easier & systematic
---> He had left vaccant space for undiscovered elements
---> He even predicted the properties of undiscovered elements
for example, he named elements undiscovered at that time as eka aluminium & eka silicon ( Gallium and Germanium )
---> He had left vaccant space for undiscovered elements
---> He even predicted the properties of undiscovered elements
for example, he named elements undiscovered at that time as eka aluminium & eka silicon ( Gallium and Germanium )
Kimmus:
Hope this helps. Any doubts regarding this question remains, kindly ask it to me. Thank you (:
Answered by
19
*systematic study of the elements
- for the first time elements were arranged in to groups and periods
* prediction of new elements and their properties
- he found the similarity in the properties of the elements on the increasing atomic mass .
* correction of doubtful atomic masses
-beryllium had been assigned with atomic mass of 13.5 by multiplying its equivalent ( 4.5) with the valency. As such it should have been placed between carbon and nitrogen . But the properties of the element suggested that it should be in the company of the elements Mg and Ca which were assigned positions in the group 2. There fore he corrected his valency as 2 and the corrected atomic mass of Be came out to be 9 .
- for the first time elements were arranged in to groups and periods
* prediction of new elements and their properties
- he found the similarity in the properties of the elements on the increasing atomic mass .
* correction of doubtful atomic masses
-beryllium had been assigned with atomic mass of 13.5 by multiplying its equivalent ( 4.5) with the valency. As such it should have been placed between carbon and nitrogen . But the properties of the element suggested that it should be in the company of the elements Mg and Ca which were assigned positions in the group 2. There fore he corrected his valency as 2 and the corrected atomic mass of Be came out to be 9 .
Similar questions