pertaining to the bile, to the bile ducts, or to the gallbladder. biliary catheter (biliary decompression catheter) a catheter inserted via a skin incision through the liver and common bile duct into the duodenum.
Not all of the atoms of a radioisotope decay at the same time, but they decay at a rate that is characteristic to the isotope. The rate of decay is a fixed rate called a half-life. The half-life of a radioisotope describes how long it takes for half of the atoms in a given mass to decay.
Questions. 1  Element X has a half-life of 6000 years. 2  Iron-59 has a half-life of 45.1 days. 3  A radioactive nucleus alpha decays to yield a sodium-24 nucleus in 14.8 hours. 4  If a sample is known to be about 10,740 years old has 400 C-14 atoms, how many atoms were in the sample when the organism died? 6 days ago.