Chemistry
Grade-9
Easy

Question

Which one is correct about Mendeleev's periodic law?

  1. Properties of elements are the periodic function of their atomic mass.
  2. Physical and chemical properties of elements are periodic functions of their atomic number.
  3. Physical properties of elements are the periodic functions of their atomic mass.
  4. Chemical properties of elements are the periodic function of their atomic number.

hintHint:

Properties are function of their atomic mass.

The correct answer is: Properties of elements are the periodic function of their atomic mass.


    • Modern day periodic table was invented by Mendeleev. There are 118 elements arranged in 7 periods and 18 groups.
    • From left to right atomic number increases by 1.
    • Down the group valence electrons remains constant.
    • Properties of elements are the periodic function of their atomic mass. 

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