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Question

What are the characteristics of Mendeleev's periodic table?


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Solution

Mendeleev's periodic table:

  • Mendeleev states that “The properties of the elements are a periodic function of their atomic weights.”

Characteristics of Mendeleev's periodic table:

  • The vertical columns in a periodic table were classified as groups while the horizontal rows are named as periods.
  • The periodic table is composed of 7 periods that are numbered between 1to7and 8 groups, numbered between 1to8.
  • Transition elements are placed in Group VIII while all the normal elements are placed between Groups I to VII.
  • Periods from 4thto7th have been divided into two series: 1st series and 2nd series.
  • Elements having similar properties have been kept in the same group. For example; Lithium, Potassium, Rubidium, etc. are in 1st group.

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