Question

. Is it possible to predict the existence of an element between two consecutive elements

in the modern periodic table? Was it possible in Mendeléev’s periodic table?​

Answer 1

Answer:

Yes, in Modern Periodic Table, elements are arranged in increasing order of their atomic numbers. As atomic number is always a natural number, therefore we can estimate no. of elements between consecutive elements by calculating the no. of natural nos. between them.

But in Mendeleev's Periodic Table, it wasn't possible because elements were arranged in increasing order of their atomic masses, which is a irregularly increasing quantity.

Hope it helps!