Q-1 Achievements of Mendeleev's Periodic Table
the Period
b)what are the drawback Mendeleev periodic table
Answers
Answer:
Achievements of Mendeleev's Periodic Table
Systematic study of the elements. ...
Prediction of new elements and their properties. ...
Correction of doubtful atomic masses. ...
Position of hydrogen. ...
Anomalous positions of some elements. ...
Position of isotopes. ...
No co-relation of elements in sub-groups. ...
Different groups for similar elements.
Explanation:
He was unable to locate hydrogen in the periodic table. Increase in atomic mass was not regular while moving from one element to another. Hence, the number of elements yet to be discovered was not predictable. Later on, isotopes of elements were found which violated Mendeleev's periodic law.
Answer:
LIMITATIONS OF Mendeleev's Periodic Table : Position of Hydrogen => Position of hydrogen in the perodic table is Uncertain , Because hydrogen is placed in 1 A group with Alkali metals . Position of isotopes => isotopes haven't been given separate place in perodic table .