52813
Also , in 1927 , Albrecht Unsöld proved that if one sums the electron density of all orbitals of a particular azimuthal quantum number of the same shell ( e.g. all three 2p orbitals , or all five 3d orbitals ) where each orbital is occupied by an electron or each is occupied by an electron pair , then all angular dependence disappears ; that is , the resulting total density of all the atomic orbitals in that subshell ( those with the same ) is spherical .
 Albrecht Unsöld
Please list all entity words in the text that fit the category. Output format is "word1, word2". 
Option: location, person, organization 
Text: {0} 
Answer:
 Albrecht Unsöld