Question

electron affinity of noble gas elements is zero please tell fast

Answer 1

electron affinity of noble gases is zero because all noble gases has achieved octet.
that is there outermost shell has 8 electrons and is filled.they take part in less reactions

Answer 2

Electron affinity of an element is the energy released when an element in the gas phase gains an extra electron to form an anion.
Noble gases have a completely filled valence shell and does not require any extra electron to become stable and so has a zero electron affinity.