Atoms of the element sodium (atomic number 11) have the electron configuration 1s22s22p63s1
with the noble gas form [Ne] 3s1
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The ground state electronic configuration for sodium is 1s^2 2s^2 2p^6 3s^1. This means that sodium has two electrons in the 1s orbital, two electrons in the 2s orbital, six electrons in the 2p orbital, and one electron in the 3s orbital.
The most likely electron configuration for a sodium ion (Na+) in its ground state is 1s2 2s2 2p6. This configuration represents the electronic structure of a sodium atom that has lost one electron to become a sodium ion, achieving a stable octet configuration similar to that of a noble gas.
The electronic configuration for sodium is 1s2 2s2 2p6 3s1. Sodium has 11 electrons, so it fills the 1s, 2s, and 2p orbitals before moving to the 3s orbital where it has its remaining electron.
Sodium has an electronic structure of 2, 8, 1 with one electron in its outermost shell, while chlorine has an electronic structure of 2, 8, 7 with seven electrons in its outermost shell. This difference in electron configuration determines their chemical properties, with sodium being a reactive metal and chlorine being a reactive nonmetal.
The electronic configuration for bromine is [Ar] 4s2 3d10 4p5.