The lowest atomic number ion is Se^2-.
The highest atomic number ion is Sr^2+.
The ones in the middle are NOT Br^- or Rb^+. However, I do not know what the correct answer for those two is.
The electron configuration for the element KR is [Ar] 3d10 4s2 4p6.
Rb(+) Br(-) Se(2-) Sr(2+)
[Ar] 3d2 4s2
Pallidium
EF4
Phosphorus
The element Ar 4s2 3d10 4p6 is Krypton (Kr).
The electron configuration of the element with the atomic number 39 (yttrium) is: [Kr]4d15s2.
In
Iodine is the element with that configuration.
The electron configuration of zirconium is: [Kr]5s24d2
Zirconium - but it could be simplified to [Kr] 4d2 5s2
NO!!!! Each element has it own ground state electron configuration. Rubidium is [Kr] 5s1 Strontium is [Kr] 5s2. Notice that strontium has one MORE electron than Rubidium. The symbol [Kr] is shorthand for the full electron configuration of krypton.
[Ar] 3d2 4s2
The electron configuration, in standard form, is [Kr] 4d10 5s2 5p6.
The condensed electron configuration of rubidium is [Kr] 5s1 in the 1st group of period V
The chemical element with the atomic number 41 is niobium; the electron configuration is:[Kr]4d4.5s1.
Pallidium
Kr is 1s22s22p63s23p64s23d104p6