A noble gas is an element that is essentially in gaseous state and which has all filled orbits in its atom. Krypton is one of the six noble gasses. (The other noble gases are Helium, Neon, Argon, Xenon and Radon). The symbol of krypton is Kr. The atomic number (or charge number) of krypton is 36 – it means krypton has 36 protons in its nucleus and 36 electrons orbiting the nucleus.

Sir William Ramsay (whose sketch/painting you can see in the picture alongside) discovered the element krypton in the year 1898, much more than a century ago. He was awarded the Nobel Prize in Chemistry in the year 1904 for the discovery of krypton and other noble gases. Krypton is present in infinitesimally small quantities in nature – it is present at a concentration of 1 ppm in air. 1 ppm stands for 1 part per million; means for a million parts of air, there will be only one part of krypton! Since its discovery, krypton has found many uses. Here is an account of the physical and chemical properties of krypton.

Physical Properties of Krypton

Chemical Properties of Krypton

In spite of being a chemically unreactive element, krypton has been used to synthesize many compounds that find applications in making neon lamps, flash light for high-speed photography, etc. There are many uses of krypton, even if it is a rare gas at 1 ppm in the atmosphere. Probably this is something we should learn from the gas – though inconspicuous, it is mighty useful!

by mySAPL

Mycoolcell.com has added a new line to their already extensive selection of accessories. Joining their array of batteries, covers, skins, protectors, cables, hand-free equipment and much more is an assortment of Otterbox 4 iPhone cell phone covers for iPhone and Blackberry users.

Customers will want to protect the investment they have made in their phones by buying the best protection possible at a great price. Two styles of Otterboxrotectors are now available: the Commuter, and the Defender. Both will protect your device from scratches, drops or other shocks. Several color and model choices are available in each.

The Commuter phone protector is a little slimmer, and has a smooth finish, making it easy to slide into a pocket or handbag. The long-lasting cover is fashioned of three layers to provide great protection. the first layer is a film over the screen, which offers excellent defense from scratches and smears. The middle layer is a thin, silicone shock absorber, and the outer layer is beautifully colored, high-quality plastic. Port plugs keep the sensitive ports clean, yet accessible.

]]>

The durable, rugged Defender covers are also constructed of three layers. The inner layer of thin silicone film serves as screen protection. The second layer is a tough polycarbonate to guard against damage from jolts, shocks, and falls. The third layer is thin, resilient silicone to further protect the user’s phone. The Defender also includes silicone port plugs to keep dust and dirt out.

High-school and college students are eligible for a 10% discount on all cell phone accessories simply by registering their name and school information using the form on the student discount page. This is a real boon to students in this economy, who are often working as well as attending school, and don’t have much to spend. Batteries, cables and other hands-free equipment are often needed by students, as well as all the protectorscasespouches, skins and decals to protect and embellish their phones

Students will have fun browsing through all the accessories available from mycoolcell.com, but can also win prizes by producing their own youtube.com video. To enter, students simply make an attention-grabbing video demonstrating one of the cell phone accessories from mycoolcell.com, or by making an entertaining video review. The prize is one hundred dollars worth of merchandise from mycoolcell.com! This includes all of their phone and iPod accessories.

For those who aren’t yet familiar with mycoolcell.com, this company also offers discounts to teachers, police, firemen, and other government workers and civil servants on their gov/edu pages. The company appreciates those who serve the country by working for various government offices, including local, county, and state offices, and those who serve by teaching the nation’s children–the next generation of leaders.

Find all these great products and offers at mycoolcell.net, a company who cares about the community.