Helium. It only has 2 electrons in its one orbital or energy level. The next biggest would be Neon.
The "Noble gas electron configuration," or the condensed electron configuration, for F is [He] 2s2 3p5.
The number of electron shells depends on the noble gas. The number of shells will be equal to the period in which the noble gas is present.
The electron configuration and noble gas core for Li+ is that of He: Li+: (1s2, 2s0)
Chlorine gains 1 electron to achieve the noble gas electron configuration of argon.
In noble gas notation, you don't have to write the electron configuration up to that noble gas. You simply put the noble gas in brackets [noble gas] and then continue to write the electron configuration from that point. It just makes it shorter and easier to write electron configurations for elements with a lot of electrons.
The noble gas electron configuration of radon is [Xe]4f145d106s26p6.
[noble gas]ns2 np6
The calcium ion formed when it achieves a noble-gas electron configuration is Ca2+, as it loses two electrons to have the same electron configuration as argon, a noble gas.
helium
The electron configuration for Hf using noble gas shorthand is [Xe] 6s2 4f14 5d2. The noble gas shorthand represents the electron configuration of the noble gas xenon, which has an electron configuration of 1s2 2s2 2p6 3s2 3p6 4s2 3d10 4p6.
The electron configuration of cesium in noble gas form would be [Xe] 6s^1. This indicates that cesium has the same electron configuration as the noble gas xenon in addition to one extra electron in the 6s orbital.
Not a neutral Cl atom but the chloride ion Cl- is isoelectronic with the noble gas argon.