PUMPA - SMART LEARNING
எங்கள் ஆசிரியர்களுடன் 1-ஆன்-1 ஆலோசனை நேரத்தைப் பெறுங்கள். டாப்பர் ஆவதற்கு நாங்கள் பயிற்சி அளிப்போம்
Book Free Demo1.Use Mendeleev’s Periodic Table to predict the formulae for the oxides of the following elements : K, C, Al, Si, Ba
2. Name two elements you would expect to show chemical reactions similar to magnesium. What is the basis for your choice?
Answer variants:
Be (atomic number \(4\)) and Ca (atomic number \(20\)) have similar electronic configuration, i.e. two electrons in outermost shells.
Yes, Dobereiner’s triads also existed in the cells of Newland’s Octaves.
\(K_2O\), \(CO_2\), \(Al_2O_3\), \(SiO_2\), \(BaO\).
Mendeleev used the relationship between the atomic force of the elements and their physical and chemical properties.
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