589 nm

Two spectral lines of sodium D1 and D2 have wavelengths of approximately 5890 and 5896 Å sodium lamp sends incident plane. Two spectral lines of sodium D1 and D2 have wavelengths of approximately 5890 and 5896 Å sodium lamp sends incident plane wave on a slit of width 2 x 106 m.

11

The nex six electrons will go in the 2p orbital. The p orbital can hold up to six electrons. We’ll put six in the 2p orbital and then put the remaining electron in the 3s. Therefore the sodium electron configuration will be 1s22s22p63s1.

[Ne] 3s¹

So for sodium, we make the substitution of [Ne] for the 1s22s22p6 part of the configuration. Sodium’s noble gas configuration becomes [Ne]3s1….Noble Gas Configuration.

The elements that are found in the last column of the periodic table are an important group of elements that are called the noble gases. They are helium, neon, argon, krypton, xenon, and radon….Noble Gas Configurations.

Explanation: In shorthand electron configuration, the electron configuration starts with the symbol of the noble gas in the previous period, followed by the additional configuration of the electrons for the given element.

So… for the element of SODIUM, you already know that the atomic number tells you the number of electrons. That means there are 11 electrons in a sodium atom. Looking at the picture, you can see there are two electrons in shell one, eight in shell two, and only one in shell three.

The Valence Electrons of Sodium Ions in Solution In solution, the sodium and chlorine atoms separate to form sodium and chlorine ions, but the sodium valence electron stays with the chlorine atom. As a result, the sodium ion has a complete outermost electron shell of eight electrons and a positive charge of plus 1.

Most sodium is obtained by electrolysis of molten mineral sodium chloride (halite). Some is obtained from trona and soda ash. It occurs in many other minerals as well, including amphibole, zeolite and cryolite.

Sodium is now produced commercially through the electrolysis of molten sodium chloride, based on a process patented in 1924. This is done in a Downs cell in which the NaCl is mixed with calcium chloride to lower the melting point below 700 °C.