[Xe] 4f3 6s2
[Xe] 4f3 6s2
The electron configuration of americium is [Rn]5f7.7s2.
I assume you mean the Nobel gas electron configuration abbreviation for barium.[Ne] 6s2=======
The correct noble gas configuration for Li is neon (1s^2 2s^1).
No, potassium does not have a noble gas electron configuration. The noble gas configuration for potassium would be [Ar] 4s¹, but instead, potassium has the electron configuration 1s² 2s² 2p^6 3s² 3p^6 4s¹.
If you think to the electron configuration of promethium this begin with [Xe].
Cs does not have a nobel gas electron configuration, as it contains one valence electron in its outermost s orbital. Be3+ also does have a nobel gas electron configuration, as this occurs when Be has a 2+ charge (the typical Be ion is Be2+).
[Xe] 4f3 6s2 or 2, 8, 18, 21, 8, 2
The noble gas configuration for zirconium is [Kr] 4d^2 5s^2. This means that zirconium has the same electron configuration as krypton (Kr) up to the 4d^2 5s^2 levels, which are the valence electrons in zirconium.
The noble gas that has the same electron configuration as the oxygen atom in a water molecule is neon (Ne). Both have a full valence shell with 8 electrons, making them stable and unreactive.
The Alkali Metals loose one electron in order to achieve a nobel gas configuration.
An atom with 8 electrons in its outer shell is stable and is considered to have a full valence shell. This configuration is known as the octet rule, which means the atom is unlikely to form chemical bonds with other atoms as it is already in a stable state.