The bromine electron configuration is 4s23d104p5.
The noble gas krypton has the same electron configuration as an ion of bromine, Br-.
Iron has the electron configuration [Ar]3d64s2.
Bromine has seven electrons in its outermost energy level. It can get the stable electron configuration by getting one electron from another atom which makes the -1 charge.
None - it would have to GAIN one.
The bromine electron configuration is 4s23d104p5.
1s22s2
The noble gas krypton has the same electron configuration as an ion of bromine, Br-.
Iron has the electron configuration [Ar]3d64s2.
Bromine has seven electrons in its outermost energy level. It can get the stable electron configuration by getting one electron from another atom which makes the -1 charge.
Bromine
None - it would have to GAIN one.
Bromine has 7 electrons in its fourth energy level.
2
bromine has 17 electrons in the valence shell. by gaining one electron it gets the electronic configuration of the next noble gas. hence it gains one electron and forms -1 ion
The element with that electron configuration is Kr, krypton.
Iodine's electron configuration is 2, 8, 18, 18, 7; bromine's is 2, 8, 18, 7. At the simplest level of modelling there is one more electron shell occupying space in an iodine atom than in one of bromine.