SOLUTION (a) We write the complete electron configuration by simply moving across the periodic table one row at a time and writing the occupancies of the orbital corresponding to each row (refer to Figure 6.29). Ground-state means that Bismuth is in its lowest energy form (not in an excited state). Both of the configurations have the correct numbers of electrons in each orbital, it is just a matter of how the electronic configuration notation is written (here is an explanation why). The K shell contains a 1s subshell hence it can carry 2 electrons, the L shell has 2s and 2p, and can carry 8 electrons. The general electronic configuration of group 15 elements is ⦠The three p-electrons ought to be unpaired and hence the element should be paramagnetic. Correct Electron Configuration ⦠The maximum electrons that can be carried by the sub-shell S is 2, by P is 6, by D is 10, and the F sub-shell can carry 14. In 1845, Michael Faraday demonstrated that it was a property of matter and concluded that every material responded (in either a diamagnetic or paramagnetic way) to an applied magnetic field. Diamagnetism was first discovered when Anton Brugmans observed in 1778 that bismuth was repelled by magnetic fields. Moving from element 80 to element 81 puts us into the p block in the 6 p subshell. The only explanation I can come up with is that bismuth is BOTH paramagnetic AND diamagnetic at the same time, and so are all elements which have unpaired electrons. Nitrogen family elements consists of atoms having 5 electrons in their outer energy level. Ga. State where in the periodic table these elements appear: an element whose valence electrons are 4s24p1. Nitrogen family elements often ⦠(c) How many unpaired electrons does each atom of bismuth possess? Nitrogen, phosphorus, arsenic, antimony and bismuth are the main group elements that have 3 unpaired electrons. The only explanation I can come up with is that bismuth is BOTH paramagnetic AND diamagnetic at the same time, and so are all elements which have unpaired electrons. Therefore we have (still incorrect) 1s 2 2s 2 2p 6 3s 2 3p 6 3d 9 4s 2. Bismuth: Atomic number = 83 # of electrons = 83 e- On a suggestion by William Whewell, Faraday first referred ⦠Practice Exercise 1 (6.7) How many of the electrons in the second row of the periodic table (Li through Ne) will have at least one ... How many unpaired electrons does bismuth a atom have? Place the following elements in order of decreasing atomic size: bismuth, bromine, neon, cesium, barium, and arsenic. Two of the electrons are in the s subshell, with 3 unpaired electrons in the p subshell. Sample Exercise 6.9. How many unpaired electrons does a bismuth atom have? Practice Exercise 1 (6.9) A certain atom has an [noble gas]5s24d10504 electron configuration. This decides the electron capacity of the shells. 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