The element, plutonium
The electron configuration and noble gas core for Li+ is that of He: Li+: (1s2, 2s0)
The noble gas core notation for Se-2 is [Kr] 4d10 5s2 5p6.
The noble gas core notation for Calcium is [Ar]4s2. This notation represents the electron configuration of Calcium by using the nearest noble gas (Argon) as a reference.
The noble gas core configuration of rubidium is [Kr]5s1. It is derived from the electron configuration of the noble gas krypton ([Kr] = 1s22s22p63s23p63d104s24p6), followed by the valence shell configuration of rubidium (5s1).
The symbol for the noble gas used to represent the core electrons of zirconium is [Kr] (krypton). This notation indicates that the core electrons of zirconium are equivalent to the electron configuration of krypton, which is a noble gas with a filled electron shell, so Zr would have the same core electron configuration as Kr.
The noble gas core for fluorine is neon. So the electron configuration for fluorine with a noble gas core is [Ne] 3s^2 3p^5.
[He]
The electron configuration and noble gas core for Li+ is that of He: Li+: (1s2, 2s0)
[Ar]3d104s24p3
The noble gas core notation for Se-2 is [Kr] 4d10 5s2 5p6.
The noble gas core notation for Calcium is [Ar]4s2. This notation represents the electron configuration of Calcium by using the nearest noble gas (Argon) as a reference.
[Kr]4d105s25p1
[Ar]3d104s24p2
The noble gas core configuration of rubidium is [Kr]5s1. It is derived from the electron configuration of the noble gas krypton ([Kr] = 1s22s22p63s23p63d104s24p6), followed by the valence shell configuration of rubidium (5s1).
The symbol for the noble gas used to represent the core electrons of zirconium is [Kr] (krypton). This notation indicates that the core electrons of zirconium are equivalent to the electron configuration of krypton, which is a noble gas with a filled electron shell, so Zr would have the same core electron configuration as Kr.
The noble gas shortcut for Br (Bromine) is [Ar] 4s2 3d10 4p5. The noble gas Argon (Ar) has an electron configuration of 1s2 2s2 2p6 3s2 3p6, which is the closest noble gas with a lower atomic number to Bromine.
The noble gas notation for germanium is [Ar] 3d10 4s2 4p2. This notation represents the electron configuration of germanium with the argon noble gas core followed by the valence electrons in the 4s and 4p orbitals.