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.
1 PEComa is a family of tumors made up of abnormal cells called perivascular epithelial cells. 2  Although most of these tumors are benign, some rare PEComas are malignant (cancer). 3  The most common of these tumors are angiomyolipoma and lymphangioleiomyoma.4  Angiomyolipoma is a benign tumor that most often affects the kidney. Hibernomas, benign tumors of fat tissue. 2  Lipomas, very common benign tumors of fat tissue. 3  Leiomyomas, benign tumors of smooth muscle that can be found anywhere in the body but are very common in the walls of the uterus where they are known as fibroids.