Question

8. Consider the process of shielding in atoms, using Be as an example. What is being shielded? What is it being shielded from? What is doing the shielding? 9. a. Which set of orbitals is defined by the quantum numbers n= 3 and 1=2? How many orbitals are there in this set? b. How many radial nodes does a 5s orbital have?

Answer 1

soluhon - consider the process. Of shielding in a t'ms. by using beryllium as example - In multi-elechon atoms, the elections in the ou termost shell are doreened from the nucleane by the inner elechons. 2. As result, the electrons in the outermost shell do not experience the full charge of the nucleuse considering the frample of be The flechonic configurahoon Of B is is is a The elections in the outermost as orbital do not experience the full charge of the nucleas because there is an inter vening shell Cor core) of Is Yele hroni. 9 The effective charge felt by the as electron, che - as effective nucleal charge) will be ley than the - actual nucleal charge. known 2 this means that the inner orbital ele foon Loud serve as screen betwen the nucleans and the outermost tlechons :

o intervening elections 1. The outer most elechon does not experience that much attraction from the nucleus which would have experienced if there were no inlervenica This is called the sheilding effect on thi Sade en ing effect. * * The ou leo 25 Elechonj are being shield The outer 23 elechons are being shielded from the nucleal charge ouro eal charge. can tour of *. are doi The inner Corcore) 18 elections the shielding