Meneleev arranged the elements
He had to arrange the elements in a specific sequence to unlock the hidden pattern.
a pattern of properties between the elementseven though I am dumbI am gay
they discovers a repeating pattern of properties
The elements are arranged in what is called the periodic table.
The Periodic Table of Elements.
Atomic Mass.
Dmitri Mendeleev was a Russian chemist who is best known for creating the periodic table of elements. He arranged the elements based on atomic mass and properties, thus predicting the properties of undiscovered elements and leaving gaps for them in his table. Mendeleev's periodic table laid the foundation for modern chemistry.
If you mean his predictions about the periodic table then yes his predictions were correct.
Dmitri Mendeleev
The mass of the elements
The periodic table
mendelev arranged the elements in the periodic table in the asending order of the mass number of elements.