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.
Technetium-99m only emits gamma rays and decays to technetium-99. Technetium-99 (99 Tc) is a major product of the fission of uranium-235 (235 U), making it the most common and most readily available isotope of technetium.One gram of technetium-99 produces 6.2Ã10 8 disintegrations a second (that is, 0.62 G Bq /g).ong-lived technetium isotopes produced commercially are by-products of fission of uranium-235 in nuclear reactors and are extracted from nuclear fuel rods.