Question

write three features of mendeleev's periodic table?​

Answer 1

Answer:

Mendeleev arranged the elements in horizontal rows (known as periods) in the increasing order of their atomic masses. Each vertical column (called groups) contained elements of similar properties. The main features of Mendeleev's periodic table are: Groups and sub-groups: There are eight groups (I to VIII).

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Answer 2

Answer:

1) it states that physical and chemical properties of an element are periodic function of their atomic masses

2) he boldly predicted the prediction of some elements in future for example gallium and germanium were discovered later but he left spaces knowing they'll posses same properties and name them eka silicon and eka boron