What were the defects in Mendeleev’s periodic classification.
Answers
Answer:
☑️✓✓™®©Mendeleev's periodic table suffered defects as follows: The position of hydrogen was not correctly defined. It was placed in group I although it resembles both the group I elements - the alkali metals and the group VII elements-the halogens, in their properties.....
Answer:
The defects are -
Explanation:
1 . Anomalous pairs
argon with mass 39.9 precedes potassium with mass 39.1
2 . position of isotopes
they are given different places but should be placed together
3 . Grouping of chemically dissimilar elements
4 . Separation of chemically similar elements
5 . It doesn't explain the electron arrangement
6 . Position of hydrogen
it was not given a fixed position it is considered in group lA as well as in group VllA , cos it can form a positive as well as negative in
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