Question

prediction of new elements??​

Answer 1

Answer:

When Mendeleev arranged the elements in order of increasing atomic mass, the properties where repeated. ... Mendeleev went even further. He corrected the known atomic masses of some elements and he used the patterns in his table to predict the properties of the elements he thought must exist but had yet to be discovered.

@YogiChaudhary

Answer 2

It means all elements are not discovered yet. There are still more elements to be discovered.

Hence this is the prediction of new elements.

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