0.7 Chapter 2. section 2.3.2. application of inert gases.  (Page 2/3)

Xenon- Xenon is used for various applications. From incandescent lighting, to development in x-rays, to plasma display panels (PDPs) and much more. Incandescent lighting uses Xenon because less energy can be used to produce the same amount of light output as a normal incandescent lamp. Xenon has also made it possible to obtain better x-rays with reduced amounts of radiation. When mixed with oxygen, it can enhance the contrast in CT imaging. The revolutionize the health care industries. Plasma display panels (PDPs) using xenon as one of the fill gases may one day replace the large picture tube in television and computer screens. This promises a revolution in the television and computer industries.

Nuclear Fission products may include a couple of radioactive isotopes of xenon, which also absorb neutrons in nuclear reactor cores. The formation and elimination of radioactive xenon decay products can be a factor in nuclear reactor control.  

Radon- Radon has been said to be the second most frequent cause of lung cancer, after cigarette smoking. However, it can be found in various beneficial applications as well. For examples through: radiotherapy, relief from arthritis, and bathing. In radiotherapy, radon has been used in implantable seeds, made of glass or gold, primarily used to treat cancers. For arthritis, its been said that exposure to radon mitigates auto-immune diseases such as arthritis. Those who have arthritis have actually sought limited exposure to radioactive mine water and radon to relief their pain. However, radon has nevertheless found to induce beneficial long-terms effect. Some places actually have "Radon Spas". For examples: Bad Gastern, Austria and Japanese Onsen in Misasa, Tottori. "Radon Spa" is a relieving therapy where people sit for minutes to hours in a high-radon atmosphere, believing that low doses of radiation will boost up their energy.

Section 2.4. Covalent bonding, ionic bonding, metallic bonding and Van-der-Wal’s Weak Force bonding.

In this Universe all subsystems and this Universe itself is always moving to minimum energy configuration because this is the stable equilibrium condition. So is the case with atomic configurations known as molecules or with atomic periodic configuration in a single crystal solid. How the atoms, identical or dissimilar, will stably configure will be decided by the minima energy configuration. Minima energy configuration will decide the type of bond in a given molecule or in a solid state crystalline structure.

Covalent, Ionic and Metallic bonds are primary bonds and require more than 1eV/atom dissociation energy.

Van-der-Waal’s Weak Force Bonding is secondary bonding and requires less than 0.1eV/atom dissociation energy.

2.4.1. Ionic Bonding.

In a chemical compound of first group Alkali metal (Li,Na,K,Rb,Cs) and seventh group Halogen element (F,Cl,Br,I) minimum energy configuration is obtained through ionic bonded alkahalide salts namely KF, LiF,MgO, CsCl and ZnS. Figure 2.5 illustrates the minimum energy configuration of NaCl .