Valence shells of noble gases are completely filled, so they have no tendency to lose, gain or share electrons easily. He and Ne being small in size possess very high ionisation energies and thus, their electrons cannot be excited to higher energy levels. Due to these reasons, compounds of He and Ne are not known.

The atomic number of helium is 2. Therefore it contains two electrons in its K shell, that is its K shell is complete. Thus it has a stable inert gas configuration and hence does not need to gain or lose any electron. As a result of this, He is inert and does not form any chemical compound.

All noble gases have full s and p outer electron shells (except helium, which has no p sublevel), and so do not form chemical compounds easily. Because of their high ionization energy and almost zero electron affinity, they were not expected to be reactive.

Matter

Ytterbium –

Scandium is used in aluminum-scandium alloys for aerospace industry components and for sports equipment such as bicycle frames, fishing rods, golf iron shafts and baseball bats. Scandium iodide is used in mercury vapor lamps, which are used to replicate sunlight in studios for the film and television industry.

Scandium is paramagnetic from 0 K (−273 °C, or −460 °F) to its melting point (1,541 °C, or 2,806 °F). It becomes superconducting at −273.1 °C (−459.6 °F) at pressures exceeding 186 kilobars….Scandium.

Scandium can be stiffer and lighter than titanium, but not as strong or durable. This is assuming the tube design is about equal. A good designer and fabricator can make a frame (of any material) stronger or lighter or stiffer depending on the users needs.

Scandium is a chemical element with the symbol Sc and atomic number 21….

Vanadium is used for treating diabetes, low blood sugar, high cholesterol, heart disease, tuberculosis, syphilis, a form of “tired blood” (anemia), and water retention (edema); for improving athletic performance in weight training; and for preventing cancer.

Vanadium is a hard, silver-grey metallic element. It is a ductile transition metal with a natural resistance to corrosion and stability against alkalis, acids and salt water. Vanadium is found in over 60 different minerals including vanadinite, carnotite, roscoelite and patronite.

Vanadium can enter the body via the lungs or, more commonly, the stomach. Most of the dietary vanadium is excreted. The amount of vanadium resorbed in the gastrointestinal tract is a function of its oxidation state (VV or VIV) and the coordination environment.

At common concentrations, vanadium is non-toxic. The main source for potentially toxic effects caused by vanadium is exposure to high loads of vanadium oxides in the breathing air of vanadium processing industrial enterprises. Vanadium can enter the body via the lungs or, more commonly, the stomach.

The International Agency for Research on Cancer (IARC) has classified vanadium pentoxide as possibly carcinogenic to humans based on evidence of lung cancer in exposed mice. The Department of Health and Human Services (DHHS) and EPA have not classified vanadium as to its human carcinogenicity.