engineering recuitment BARC Stipendiary Trainee Category II 2023 Mock Test General Science Chemistry
What was the position of noble gases in the Mendeleev’s periodic table?
1
Noble gases were there in the second group.
2
Noble gases, being very inert, were not necessarily put in the periodic table.
3
Noble gases were not discovered by that time.
4
Mandeleev divide all elements into 8 groups, so there was no place for noble gases.