The holes suggested that there were "missing" elements that hadn't been discovered yet. Mendeleev successfully predicted the basic properties of germanium, which hadn't been discovered at the time, based on the properties he expected an element in that position to have. He called it "eka-silicon" (eka is a Sanskrit word meaning "one", because it was one period "higher" than silicon).
When germanium was later discovered and turned out to have properties very similar to what Mendeleev had predicted, it went a long way towards validating Mendeleev's concept.
DiscoVery of new elements
He left too many spaces between the elements......
Mendeleev predicted that properties of elements are periodic function of atomic mass. He demonstrated it by creating a table.
bi and po
Mendeleev predicted the name "eka-aluminium" for the element that is now known as gallium. This naming convention was based on the positions of the elements in his periodic table.
To understand the concept of Periodic Table
DiscoVery of new elements
He left too many spaces between the elements......
they changed the 3 new Elements.
elements
not if u mean completely filled in but square by square yes
In Mendeleev's periodic table, the elements were arranged in the increasing order of their atomic masses and repeating periodic properties.
Mendeleev predicted that properties of elements are periodic function of atomic mass. He demonstrated it by creating a table.
bi and po
Dmitri Mendeleev was a Russian chemist; he proposed the modern Periodic Table of elements in 1869.
Mendeleev's table was more systematic. Elements were arranged in order of atomic masses.
To attach table legs with bolts, first align the leg with the table corner and mark the holes. Drill pilot holes in the table and leg. Insert bolts through the holes and tighten with nuts using a wrench. Repeat for all legs.