Radon is a noble gas; it has 8 electrons in its outer shell.
Electrons per shell in the radon atom: 2, 8, 18, 32, 18, 8 .
This element belongs to the period 6 and group 18, known as the noble gases. The electron configuration 6s2 6p6 indicates that the outermost energy level is fully occupied, making the element stable and inert.
[Rn] 7s2 is the noble gas notation for radium. A link is provided to the Wikipedia article on radium.
The noble gas configuration of francium is [Rn]7s^1, where [Rn] represents the electron configuration of radon, a noble gas element. Francium has one valence electron in the 7s orbital, making it highly reactive.
There are 86 core electrons in radium (Ra), which is the number of electrons in filled inner electron shells. Radial's electron configuration is [Rn] 7s2, where [Rn] represents the electron configuration of radon (Rn) as the previous noble gas element.
The noble gas electron configuration of radon is [Xe]4f145d106s26p6.
The element with this electron configuration is carbon (C). This electron configuration corresponds to 6 electrons, which is the atomic number of carbon.
The element with this electron configuration is manganese (Mn), which has 25 electrons.
The shorthand electron configuration of radon (Rn) is [Xe] 4f¹⁴ 5d¹⁰ 6s² 6p⁶. This notation indicates that radon has a complete outer shell of electrons, with the electron configuration of the noble gas xenon (Xe) preceding it, plus additional electrons in the 4f, 5d, 6s, and 6p orbitals. Radon is a noble gas and is located in group 18 of the periodic table.
Vanadium ( V) has that configuration. Its atomic number is 23.
The noble gas configuration of plutonium is [Rn] 5f6 7s2. This configuration represents the electron arrangement of plutonium in a stable state, similar to a noble gas element, in this case radon.
Lithium (Li) has the electron configuration 1s2 2s1.