PUMPA - SMART LEARNING
எங்கள் ஆசிரியர்களுடன் 1-ஆன்-1 ஆலோசனை நேரத்தைப் பெறுங்கள். டாப்பர் ஆவதற்கு நாங்கள் பயிற்சி அளிப்போம்
Book Free Demo1.Did Dobereiner’s triads also exist in the columns of Newlands’ Octaves ? Compare and find out.
2. What were the criteria used by Mendeleev in creating his Periodic Table?
Answer variants:
Yes, Dobereiner’s triads also existed in the columns of Newland’s Octaves.
zinc, helium, lithium, beryllium, boron, carbon, nitrogen, oxygen, fluorine and neon.
Mendeleev used the relationship between the atomic masses of the elements and their physical and chemical properties.
Sodium and Helium
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