write three features of Mendeleev's periodic table
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Mendeleev classified periodic table into horizontal rows and vertical coloumns. The horizontal rows are called as periods and vertical columns are called groups. 2. The elements with similar properties comes into same group.
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↪ Salient features of Mendeleev's periodic table are
✡ It shows relationship in properties of elements of a group .
✡The study of a sub-group explains the properties of elements of that group .
✡Valence of many elements were corrected , eg. -- Be was assumed to be trivalent but it was later reported to ve bivalent.
✡The comparative studies of elements were made easier.
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