Neon, if you are talking about an oxygen ion.
Argon has the same electron configuration as a sodium ion. Sodium ion has lost 1 electron from its outer shell, making its electronic configuration 2, 8. Argon's electronic configuration is also 2, 8 in its outer shell.
neon
The noble gas configuration for oxygen is [He] 2s2 2p4, which means that it has the same electron configuration as neon except with two additional electrons in the 2p orbital. This configuration reflects the stable arrangement of electrons in the outer shell of oxygen, similar to a noble gas.
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.
Alkali metal atoms need to lose one electron to achieve the stable electron arrangement of the nearest noble gas. This is because the noble gases have a full valence shell, which is more stable. By losing an electron, the alkali metal atoms achieve a full valence shell and become more stable.
No element has the exact same election arrangement as another element. However ion can have the same election arrangement as another element. For example Chloride (Cl-) has the same configuration as Argon, and Potassium (I) (K+) also has the same configuration as argon.
An ion of bromine has the electron shell arrangement of 2, 8, 18, 7. Therefore, an atom that has the same electron shell arrangement would be one that has 35 electrons, such as the element bromine itself before it becomes an ion with a charge of -1.
Krypton has the same electron arrangement as Sr2. Both have a total of 36 electrons arranged in outer shells with the electron configuration 1s2 2s2 2p6 3s2 3p6 4s2 3d10 4p6.
The noble gas that has the same electron configuration as a chloride ion is Aragon.
Chlorine needs to gain one electron to achieve the same electron arrangement as neon, which has a stable octet (eight valence electrons). By gaining one electron, chlorine will have a full outer shell with eight electrons, resembling the electron arrangement of neon.
All of the elements in Period 3, excluding group 18/VIIIA, have the same inside electron arrangement as phosphorus. They all have the electron configuration of neon as their inside arrangement of electrons.
Argon has the same electron configuration as a sodium ion. Sodium ion has lost 1 electron from its outer shell, making its electronic configuration 2, 8. Argon's electronic configuration is also 2, 8 in its outer shell.
All of the elements in Period 3, excluding group 18/VIIIA, have the same inside electron arrangement as phosphorus. They all have the electron configuration of neon as their inside arrangement of electrons.
no they have to be in the same group
Krypton.
neon
The noble gas configuration for oxygen is [He] 2s2 2p4, which means that it has the same electron configuration as neon except with two additional electrons in the 2p orbital. This configuration reflects the stable arrangement of electrons in the outer shell of oxygen, similar to a noble gas.