রসায়ন
Chemistry
1.Periodic table
A Periodicity of properties of elements.
Mendeleef's periodic law.
Modified Mendeleef's periodic law.
Periodic table based on modified periodic law (atomic number)
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Chemistry
Chemistry
1.Periodic table
A Periodicity of properties of elements.
Mendeleef's periodic law.
Modified Mendeleef's periodic law.
Periodic table based on modified periodic law (atomic number)