Who predicted the existence of some yet to be discovered elements on the basis of gaps in his periodicÂ table?_x005F_x000D_

Who predicted the existence of some yet to be discovered elements on t

1.	Who predicted the existence of some yet to be discovered elements on the basis of gaps in his periodicÂ table?_x005F_x000D_
A.	Mendeleev
B.	Dobereiner
C.	Newlands
D.
Answer» B. Dobereiner