Internal Examination of a Newly Hatched Alligator. A professional can determine the gender of a very small baby alligator, 6 to 10 inches long. One method is to place the creature on its back and hold open his vent with round-tipped tweezers or forceps, with a helper's assistance.
Technetium is the only element below uranium that does not exist on Earth. It is a synthetic (man-made) element produced in a particle accelerator. For many years, chemists knew that an element with atomic number 43 must exist, based on an empty spot in the periodic table.
Although Technetium has isotopes with mass numbers ranging from 85 to 118 only 10 are regularly seen and of those only 3 are abundant, those being 97Tc, 98Tc, 99Tc. Technetium-99 is the most abundant of all isotopes since it is a major fission product in nuclear reactors (5). Moreover, the use of Technetium-99m in nuclear medicine is increasing Technetium-99 abundance. Technetium-99m is a metastable isotope that is a gamma decay product of Molybdenum-99, another abundant fissile product. Indeed the amount of Tc in the environment is going up in all its forms but especially Tc-99.