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Question
State the merits of Mendeleev's classification of elements.
Solution
Merits of Mendeleev's classification of elements:
- Grouping of elements
- Gaps for undiscovered elements: Mendeleev left some gaps in his periodic table for subsequent inclusion of elements not known at that time.
- He predicted the properties of the then-unknown elements on the basis of properties of elements lying adjacent to the vacant slots (eka-aluminum and eka-silicon).
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RELATED QUESTIONS
Besides gallium, which other elements have since been discovered that were left by Mendeleev in his Periodic Table? (any two)
What property do all elements in the same column of the Periodic Table as boron have in common?
What name were given by Mendeleev to the then undiscovered element germanium?
Which group of elements was missing from Mendeleev's original periodic table?
According to Mendeleev's periodic law, the elements were arranged in the periodic table in the order of: ______
The elements from the zero group are called _______.
Eka boron : Scandium : : Eka Aluminum : _______
Two elements in the same position : demerit of Newland's octaves : : place for Isotopes : _______
Find the odd one out and give its explanation.
Match the columns.
| Column A | Column B |
| 1) Eka-aluminium | a) Scandium |
| 2) Eka-Silicon | b) Gallium |
| 3) Eka- boron | c) Germanium |
| d) Beryllium |
