Why did Mendeleev leave gaps in his early periodic table, and what was the ultimate importance of the gaps?

how you solve this

Question

Why did Mendeleev leave gaps in his early periodic table, and what was the ultimate importance of the gaps?


how you solve this

cuanchi · Answer

He was sorting the elements according to their atomic mass and physical/chemical properties. When he didnt find an element that fit the predicted properties he left emty spaces or gaps, suggesting that may exist some element with that predicted properties but have not been discovered yet. http://en.wikipedia.org/wiki/Mendeleev's_predicted_elements

micahm · Answer

ok thank you