1. Tardigrade
  2. Question
  3. Chemistry
  4. The number of elements known at that time when Mendeleev arranged them in the periodic table was

Q. The number of elements known at that time when Mendeleev arranged them in the periodic table was

 1111  200 Classification of Elements and Periodicity in Properties Report Error

Solution:

Only elements were known at that time when Mendeleev arranged them in the periodic table.