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:
\(K_2O\), \(CO_2\), \(Al_2O_3\), \(SiO_2\), \(BaO\).
Noble gases are chemically reactive and are present in the atmosphere in extremely low concentrations.
Be (atomic number \(4\)) and Ca (atomic number \(20\)) have similar electronic configuration, i.e. two electrons in outermost shells.
It failed to arrange all the then-known compounds in triads of elements with similar chemical properties.
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