Radon is a gas that occurs naturally from the breakdownâor the radioactive decayâof uranium. Rocks, soil, and in some cases groundwater can all contain uranium.Because radon comes from so many sources, people are easily exposed to it.adon is an odorless, colorless, radioactive gas. It is also the second leading cause of lung cancer in the United States.
File Menu in MS Excel: File menu is the first menu in the MS Excel menu bar. It functions the file management and importing from external sources to MS Excel. The File menu allows one to open, save, close, print and so on in MS Excel. It gives the users options to save the workbook, open new workbook and so on.
The F8 function key is a prompt that tells the computer to display startup options before actually loading windows. When you press the f8 key during startup, a display list wiâ¦ll come up with options such as safemode, safe mode with networking, command prompt, last known good settings, system restore (windows vista/7). F8 key during start up is just to execute commands before starting windows.