The electron affinity of Be is similar to (UP CPMT 2013)

Electron affinity is the amount of energy given out when an electron is added to an isolated gaseous atom. Its value depends on the electronic configuration of valence shell. On writing and comparing the electronic configuration of given elements, the elements for which the electron affinity value is closer to Be can be obtained. 2 2 Be 4 1s ,2s 2 He 2 1s 2 2 1 B 5 1s ,2s ,2p 2 2 Li 3 1s ,2s 2 2 6 1 Na 11 1s ,2s ,2p ,3s Electronic configuration of valence shell of Be and He is same. Electron affinity of Be is similar to that of He.