Question

9.2 Mendoleer kept some blanke espaces in the
periodic table tag the elements that
were yet to be discovered Name those
elements and what were the names.
given
to theme​

Answer 1

Answer:

Mendeleev's periodic table is an arrangement of the elements that group similar elements together. He left blank spaces for the undiscovered elements (atomic masses, element: 44, scandium; 68, gallium; 72, germanium; & 100, technetium) so that certain elements can be grouped together.