PDF chapter test TRY NOW
1.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.
Register for free to see more content