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Which of the following characteristics was not included in Dmitri Mendeleev's periodic table?

A. elements arranged by increasing atomic mass

B. elements placed in columns based on chemical properties

C. distribution of elements determined by electron configuration

D. heavier elements placed in rows closer to the bottom of the table

D is what i choose but i want to make sure i am right

Respuesta :

mpanderla95
I believe the correct response would be A. Elements arranged by increasing atomic mass, this was not included in Dmitri's periodic table. Since elements are arranged according to atomic number, the heavier elements are in fact placed in the rows closer to the bottom of the table.

Answer : The incorrect option is C.

Explanation :

According to Mendeleev, the elements and their compounds having same chemical properties showed a periodic trend.

  • He arranged the elements having similar chemical properties below each other into groups.
  • He arranged the elements in order of their increasing relative atomic masses.
  • He also placed heavier elements in rows closer to the bottom of the table according to the their relative atomic masses.

Therefore, the distribution of elements determined by electron configuration was not included in Dmitri Mendeleev's periodic table.

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