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-95, with a half-life of 61 days, is used as a radioactive tracer. Technetium-99, has a very long half-life (2.11 X 10 5 years) and decays almost entirely by beta decay with no gamma rays.It is used as for equipment calibration.echnetium is a rare, silver-gray metal that tarnishes slowly in moist air. In powder form, it burns in oxygen to the heptoxide (Tc 2 O 7). Technetium dissolves in nitric acid and concentrated sulfuric acid, but is not soluble in hydrochloric acid of any strength.