Question

What do you the noble gases are placed in separate group

Answer 1

Answer:

Explanation:

in a rocket, the fuel burns and produces gas at high temperature. ... Through the mass of gases escaping per second is very small and their momentum is very large due to their tremendous velocity of escape. An equal and opposite momentum is imparted to the rocket which despite its large mass builds up a high velocity.

Answer 2

Noble gases were discovered very late because of their low reactivity

So scientists kept them in a separate column as to not to distort the shape of the periodic table and not to disturb periodicity

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