Nobel gases have zero electron affinity.

Why the noble gases have very low boiling points?

Name two elements that have two electrons in their outermost shells.

What do you understand by electron affinity of an element ? Why electron affinity of chlorine is more than that of fluorine.

Account for the following: Nobel gases have large positive values of electron gain enthalpy.

Name three elements that have a single electron in their outermost shells.

Show with example how an accelerating body can have zero velocity.

Present a comparative account of the following: Electron affinities of fluorine and chlorine.

The minimum number of unequal forces that can have zero resultant is