Question

Each group in Mendeleev's periodic table was
sub-divided into two sub groups.
A True
B В
False​

Answer 1

In Mendeleev's periodic table, the groups were divided into two subgroups. Groups from I to VII are meant for normal elements and group VIII is for transition elements. Groups from I to VII have been divided into two subgroups, while group VIII is meant for three elements.

Answer 2

true

Elements are arranged in the periodic table in the increasing order of their relative atomic masses. In Mendeleev's periodic table, the groups were divided into two subgroups. Groups from I to VII are meant for normal elements and group VIII is for transition elements.