Final answer:
The element with the electron configuration 1s²2s²2p¶3s²3p¶4s²3d±04pµ is Bromine (Br) and is in group 17 of the periodic table.
Step-by-step explanation:
The electron configuration given is 1s22s22p63s23p64s23d104p5. This electron configuration represents the element Bromine (Br). To determine the group of the periodic table Bromine belongs to, we look at the highest p-orbital electron configuration, which is 4p5. Since there are 5 electrons in the p-orbital, and the p-block elements start at Group 13 (where the p-orbital starts to fill), we add the number of electrons to 12 (since Group 13 is the first group with a p-electron) to get the group number, which would be 17. Thus, the element with this electron configuration is in group 17 of the periodic table.