usually black
you go to google images and search for: "3d pokedex AR codes". there should be huge pictures full of AR codes. but do note that though you may have the AR codes you don't have the Pokemon on your pokedex
Co2+ has 25 electrons with the configuration: [Ar] 4s2 3d5 no its [Ar]3d^7
In the d block, there are two notable exceptions to the standard electron configurations: chromium (Cr) and copper (Cu). Instead of the expected configurations of [Ar] 3d⁴ 4s² for chromium and [Ar] 3d⁹ 4s² for copper, their actual configurations are [Ar] 3d⁵ 4s¹ and [Ar] 3d¹⁰ 4s¹, respectively. These deviations occur to achieve greater stability through half-filled and fully filled d subshells.
I dont know where to buy them, but on sites like Serebii they show you the AR codes :)
Potassium: [Ar] 4s^1 Chromium: [Ar] 4s^1 3d^5 Copper: [Ar] 4s^1 3d^10
The ground state shorthand notation for iron (Fe) is [Ar] 3d^6 4s^2.
[Ar] 3d^8 4s^2
The noble gas notation for germanium is [Ar] 3d¹⁰ 4s² 4p².
The electron configuration of titanium (Ti) is Ar 4s² 3d². When titanium loses two electrons to form Ti²⁺, the electrons are removed first from the 4s subshell before the 3d subshell. Therefore, the electron configuration of Ti²⁺ is Ar 3d².
Two exceptions to the standard order of writing electron configurations are chromium (Cr) and copper (Cu). In chromium, instead of the expected configuration of [Ar] 4s² 3d⁴, the configuration is [Ar] 4s¹ 3d⁵ to achieve greater stability through half-filled subshells. Similarly, copper has an expected configuration of [Ar] 4s² 3d⁹, but it is actually [Ar] 4s¹ 3d¹⁰, as a fully filled d subshell also provides enhanced stability.
[Ar] 3d2 4s2
B. 1s22s22p63s23p64s23d5----Chromium: [Ar]1s22s22p63s23p63d54s1Manganese: [Ar]1s22s22p63s23p63d54s2