Which items did mendeleyev write down while observing different elements

Explanation:

Mendelev wrote down a periodic table named mendelev periodic table. In his periodic table there were elements with similar properties occur at regular intervals. The tabular arrangement of elements on the basis of mendelev periodic table is calles mendelev periodic table.

This is all I know hope it helped! :D

answer; i believe the correct answer is (anemia);