Dmitri left those spaces for elements which were not discovered at that time. he named it eka-aluminium, eka silicon etc.
There is no specific reason mentioned for why Dmitri Mendeleev left blank spaces on the Periodic Table. It is believed that he left these spaces to accommodate elements that were yet to be discovered or to demonstrate the existence of elements with certain properties that were predicted but not yet confirmed. These blank spaces eventually led to the discovery of new elements and validated Mendeleev's periodic table.
Because those elements were not known at the time of Dmitri Mendeleev.
Dmitri invented a periodic table in 1869 where he arranged the elements in order of increasing atomic masses.
Dmitri Ivanovich Mendeleev (1834 - 1907) is considered the father of the periodic table.
Dmitri Mendeleev.
Dmitri Mendeleev
Because those elements were not known at the time of Dmitri Mendeleev.
I know little about the preodic table, but in the periodic table, carbon is the element. It also exists as diamond, in a different atomic structure.
Mendeleev left some gaps in his table for the elements which were not discovered at that time.Those elements were later found as silicon,gallium,germanium which were then filled in the gaps
K
I believed you are referring to Dmitri Mendeleev. He left blank space because he was able to deduce a pattern between the chemical properties of the elements an their atomic weights. He also noticed gaps in this pattern and hypothesized correctly that these blank spots corresponded to elements that had not yet been discovered.
http://en.wikipedia.org/wiki/Mendeleev%27s_predicted_elements It says he predicted more than three.
63 elements were in Dmitri Mendeleev's First periodic table 63 elements were in Dmitri Mendeleev's First periodic table
the left side of the preodic table consistes of metals, the right side is of non metals, the middle ones are transition metals.
Dmitri Mendeleev published his periodic table in 1869.
Dmitri Ivanovich Mendeleyev. Another spelling of his name is Dmitri Ivanovich Mendeleev.
Dmitri invented a periodic table in 1869 where he arranged the elements in order of increasing atomic masses.
Dmitri Ivanovich Mendeleev (1834 - 1907) is considered the father of the periodic table.