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You might have seen those bright colorful neon sign shining everywhere. Many business people are happily gaining the attention of their potential customers these days with this easily maintained custom made sign boards made up of neon lights.

If you are looking out for a reason as to why neon is not inert in a discharge tube, it is quit easier to explain it than the process of elaboration why it is inert to the chemical reactions. The voltage that is passed through the discharge tube will be accelerating a free electron by boosting up its energy level to some maximum kinetic energy. The point to be noted here is that the electrical energy that we pass through the discharge tube should possibly be high as much as necessary so that the supplied energy is more when compared to that ones required ionizing the atoms of the gas. As we all know, an atom that is ionized must be having it pulled out of the orbital to make it as a free particle as well as the atom that it lets here to stay behind will be converted into an ion that is positively charged. Then what formed next, the formed plasma from the charged ions and electrons passes over the electric current between the electrodes of the discharge tube.

If you had been ever thinking of how do these gases emits light, then here you have the answer for tit. As an option to having been detached or removed by an energetic collision what happens is the electron inside an atom will get excited to a level and start moving with high-speed. We can even say that the electron is been made to move to an orbit of higher energy level from its original level. Now an electron can not stay in that same positing for along coz once it looses its energy it will fall off back to its original energy level. When the electron goes back to its original energy level, a particle of light or a photon is released in the process. When a lot of electrons emit photons, it results in emition of light.