School Subjects
Chemistry
Periodic Table

Why did Mendeleev leave gaps in his periodic table?

User Avatar
Wiki User
September 01, 2011 7:11PM

At the time the periodic table was first devised, there were many elements that had not yet been discovered. Their existence could be inferred, but they couldn't actually be put into the table until they were discovered.
When the periodic table was first devised, there were lots of elements that had not been discovered yet.