Chemistry
Grade-9
Easy
Question
Who designed the framework of the periodic table?
- Mendeleev
- Bohr
- Lewis
- Democritus
Hint:
The modern day periodic table is called Mendeleev's periodic table.
The correct answer is: Mendeleev
- Periodic table has 118 elements.
- The horizontal rows are called periods. There are 7 periods.
- The vertical columns are called groups. There are 18 groups.
- The framework of the periodic table was designed by Mendeleev.
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