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.
They eventually gave the name technetium to the element, from the Greek word technetos, meaning artificial.. Technetium was the first element not found in the earth to be made artificially. It can now be made in much larger quantities, of at least a kilogram (two pounds) at a time.