Radon is a chemical element with symbol Rn and atomic number 86. It is a radioactive, colorless, odorless, tasteless noble gas, occurring naturally as a decay product of radium. Its most stable isotope, 222Rn, has a half-life of 3.8 days.Radon is one of the densest substances that remains a gas under normal conditions.t is a radioactive, colorless, odorless, tasteless noble gas, occurring naturally as a decay product of radium. Its most stable isotope, 222Rn, has a half-life of 3.8 days. Radon is one of the densest substances that remains a gas under normal conditions.
Top 10 unbelievable historical concurrencies. An angiomyolipoma is a benign fatty tumor that can form in kidneys. They are made up of muscle and vessels as well as fatty tissue.op 10 unbelievable historical concurrencies. An angiomyolipoma is a benign fatty tumor that can form in kidneys. They are made up of muscle and vessels as well as fatty tissue.
lymphangioma lymÂ·phanÂ·giÂ·oÂ·ma (lÄ­m-fÄn'jÄ-Å'mÉ) n. A benign tumorlike mass of lymphatic vessels or channels that vary in size, are frequently greatly dilated, and are lined with normal endothelial cells. angioma anÂ·giÂ·oÂ·ma (Än'jÄ-Å'mÉ) n. pl. anÂ·giÂ·oÂ·mas or anÂ·giÂ·oÂ·maÂ·ta (-mÉ-tÉ) A tumor composed chiefly of lymphatic vessels or blood vessels.