CBSE Class 10 Chemistry Classification Early Attempts
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- The valency of an element whose electronic configuration is 2
- The position of cobalt and nickel was anomalous pair in Mendeleev's periodic table. Please explain if it was merit or demerit of Mendeleev's periodic table?
- Write note on position of isotopes in the Mendeleev's and modern periodic table
- Dear Sir/Madame, Can you please tell me what are the limitations of Dobeniers's law according to the NCERT textbook and nothing extra. Thank you.
- Why the period 3 of the periodic table has 8 elements
- Why is atomic number considered to be a more appropriate parameter than atomic mass for the classification of elements in a periodic table?
- Are the properties of elements placed in a group same?
- Who showed for the first time that there is periodicity in properties of elements?
- Give reasons for the need of classification of elements.
- Noble gases did not find a place in Newland's Octaves. Explain.
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