Question

Which group of elements was missing from Mendele
original periodic table​

Answer 1

Correct question :

Which group of elements was missing from Mendeleev's original periodic table?

Answer:

The group of elements that was missing from Mendeleev's Periodic table was group 18 comprising of Noble gases like Helium (Helium) , Neon( Ne) , Argon(Ar) , etc .

This group was missing from the original periodic table due to the fact that these elements are highly non - reactive in nature . They did not react with any other elements . Therefore , it was difficult to predict the presence of such elements because they are chemically inert .

However , since they belonged to group 18 , i.e. the last group , they could be fitted in the modern periodic table without disturbing the Mendeleev's periodic table .

Answer 2

Answer:

it was none other that group 18