Electron Configuration Of Sodium And Chlorine. Therefore, its 17 electrons are distributed in the following manner: The electron configuration of chlorine is illustrated below.
The atoms before and after helium (h and li) follow a duet rule and tend to have the same 1s2 configuration as helium. Thus sodium will, in most cases, form a compound in which it has lost a single electron and have a full outer shell of eight electrons, or octet. It can be written as 1s 2 2s 2 2p 6 3s 2 3p 5 or as [ne]3s 2 3p 5
When sodium (na) and chlorine (cl) are combined, the sodium atoms each lose an electron, forming cations (na+), and the chlorine atoms each gain an electron to form anions (cl−).
Cl = 2, 8, 7 so it contains 7 valence electron. There are two isotopes of chlorine that are stable. Thus sodium will, in most cases, form a compound in which it has lost a single electron and have a full outer shell of eight electrons, or octet. The chlorine gains an electron, so it has the same electron configuration as the next element in the periodic table, argon.