Question

which grup was added in mendeleev periodic table​

Answer 1

Answer:

Noble gases were, discovered later to the proposed Mendeleev's periodic table. As the noble gases are inert and generally do not form hydrides or oxides, they are assigned a zero group and placed at the left extreme of Mendeleev's periodic table.

Answer 2

Answer:

Noble gases were, discovered later to the proposed Mendeleev's periodic table. As the noble gases are inert and generally do not form hydrides or oxides, they are assigned a zero group and placed at the left extreme of Mendeleev's periodic table.