When Mendeleev made the table, he found that elements with similar chemical properties formed groups. This is because the pattern of the table reflects the pattern of filling the electron shells. Mendeleev didn't know this, and his achievement is all the greater because he had only his knowledge of the way elements behave to guide him.
The table is called periodic because many traits of different elements develop recurring trends, or periods.
occurred at repeated intervals called periods
He discovered a law for the periodicity of chemical properties.
it has elements
Mendeleev predicted that properties of elements are periodic function of atomic mass. He demonstrated it by creating a table.
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A Periodic table The Periodic Table of the Elements.
Because the properties of the elements change in a periodic fashion. In the early versions, when fewer elements were known, the chemically similar elements were thought to occur every eight positions.
it has elements
To understand the concept of Periodic Table
Mendeleev's periodic table of elements certainly wasn't created in 1901
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.
they changed the 3 new Elements.
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Dmitri Mendeleev was a Russian chemist; he proposed the modern Periodic Table of elements in 1869.
A Periodic table The Periodic Table of the Elements.
Because the properties of the elements change in a periodic fashion. In the early versions, when fewer elements were known, the chemically similar elements were thought to occur every eight positions.
It looks the same as it did when Mendeleev created it. There are no changes made to the table throughout the years because Mendeleev had predicted the correct placement for all of our current known elements.