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What are the essential features of Mendeleev’s periodic table?

Asked by Topperlearning User 28th September 2016, 5:42 PM
Answered by Expert

Essential features of Mendeleev’s Periodic Table

  1. There are eight vertical columns called groups. They are numbered from I to VIII. Groups I to VII are further divided into two subgroups A and B.
  2. All the elements of a sub-group have similar properties and show same valency, which is equal to the group number.
  3. There are seven horizontal rows, known as periods. They are numbered from 1 to 7. As one moves from left to right in a period, there is a gradual change from metallic to non-metallic properties.
Answered by Expert 28th September 2016, 7:42 PM
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