describe two merits of Mendeleev periodic table
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1.He left blank places which help scientist to discover new elements
2.when noble gasses was discovered Hel could add it to periodic table without any major change
2.when noble gasses was discovered Hel could add it to periodic table without any major change
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It's limitation is
1. The position of isotopes could not be explained.
2. Wrong order of atomic masses of some elements could not be explained.
3. A correct position could not be assigned to hydrogen in periodic table.
Advantage =
He examined the relationship between the atomic masses of elements and their physical and chemical properties
1. The position of isotopes could not be explained.
2. Wrong order of atomic masses of some elements could not be explained.
3. A correct position could not be assigned to hydrogen in periodic table.
Advantage =
He examined the relationship between the atomic masses of elements and their physical and chemical properties
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