he predicted that there were elements not yet discovered
so yeah.
Yes, it is true; Mendeleev supposed that these places will be occupied in the future by the new discovered elements.
Mendeleev left spaces for undiscovered elements. He named them eka-aluminium, eka-silicon etc.
Scientists suggest Mendeleev left gaps in the periodic table because Mendeleev knew the elements existed; however, was unable to prove it.
The usefulness of Mendeleev's periodic table was confirmed by the discovery of elements with predicted properties.
Mendeleev arranged the elements in a table with the rows ordered by atomic mass and the columns ordered the elements properties.
On his Periodic Table Mendeleev left the blank spaces, because he thought there would be elements that would follow his pattern.
The greatest triumph of Mendeleev's periodic table was his predictions of the existence of the undiscovered elements.
Mendeleev left spaces for undiscovered elements. He named them eka-aluminium, eka-silicon etc.
Mendeleev table allow predictions on the elements undiscovered at the time.
mendeleev creates a Periodic Table mendeleev predicts undiscovered elements moseley arranges the periodic table by atomic number a periodic table is created by mendeleev mendeleev predicts undiscovered elements the periodic table is arranged by atomic number by a man named moseley
Scientists suggest Mendeleev left gaps in the periodic table because Mendeleev knew the elements existed; however, was unable to prove it.
The usefulness of Mendeleev's periodic table was confirmed by the discovery of elements with predicted properties.
mendeleev creates a periodic table mendeleev predicts undiscovered elements moseley arranges the periodic table by atomic number a periodic table is created by mendeleev mendeleev predicts undiscovered elements the periodic table is arranged by atomic number by a man named moseley
Dmitri Mendeleev
Mendeleev arranged the elements in a table with the rows ordered by atomic mass and the columns ordered the elements properties.
I believe the correct answer is he was able to predict the existence of yet undiscovered elements, due to the gaps. For instance, I believe germanium was one of the elements undiscovered in the table, its placeholder was called ekasilicon.
On his Periodic Table Mendeleev left the blank spaces, because he thought there would be elements that would follow his pattern.
Mendeleev arranged the elements in order of increasing related Atomic Mass