Dmitri Mendeleev
On his Periodic Table Mendeleev left the blank spaces, because he thought there would be elements that would follow his pattern.
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.
Those gaps were later filled by elements discovered after the creation of the table, which justified the gaps being left for that purpose.
The periodic table is arranged from left to right in the order of atomic numbers.
Metals are grouped together to the left of the Periodic table.
There were 3 blank spaces in mendeleev's Periodic Table. He left it for the elements which were not discovered at that time.
Mendeleev left blank spaces because certain elements on the Periodic Table were not known at that time. He knew that in the future, those elements would be found and placed on the periodic table.
On his Periodic Table Mendeleev left the blank spaces, because he thought there would be elements that would follow his pattern.
atomic numbers
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 when he formulated his periodic table.
Russian chemist Dimitri Mendeleev started the development of the periodic table, arranging chemical elements by atomic mass. He predicted the discovery of other elements, and left spaces open in his periodic table for them.
Mendeleev left 3 blank spaces for the elements that had not yet been discovered.
Those gaps were later filled by elements discovered after the creation of the table, which justified the gaps being left for that purpose.
On left side and center of the periodic table.
Metals are grouped together to the left of the Periodic table.
The periodic table is arranged from left to right in the order of atomic numbers.