The gaps represented the elements which were not discovered. When the elements were invented, they were placed into these gaps.
No. they dont represent the periodic table.
Because those elements were not discovered at the time Mendeleev proposed the 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.
Arsenic
When Mendeleev proposed his periodic table, he noted gaps in the table, and ... Initial versions of the periodic table did not give the rare earth elements the ... that these atomic elements would be discovered, that he included them in later.
Gaps
he knew that later on the gaps would eventually get filled up
Long dashes in the Mendellev's periodic table represent the element which were not discovered yet and these elements were discovered later on.
Symbols represent name of the element. They signify the position of element in periodic table.
The gaps estimated their chemical properties.The elements when discovered were found to have those properties.They were then placed in these gaps.
groups
Zinc