Chemistry
Grade-9
Easy
Question
Which one is correct about Mendeleev's periodic law?
- Properties of elements are the periodic function of their atomic mass.
- Physical and chemical properties of elements are periodic functions of their atomic number.
- Physical properties of elements are the periodic functions of their atomic mass.
- Chemical properties of elements are the periodic function of their atomic number.
Hint:
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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