1871 Dmitrii Ivanovich Mendelev predicts the existance and properties of the element after zinc in the periodic table. He Gives it the name 'eka aluminium'. 1875 Paul Emile Lecoq de Boisbaudran discovers gallium. Its properties closely match those predicted by Mendelev.         Gallium, atomic number 31, is very similar to aluminum in its chemical properties. It does not dissolve in nitric acid because of the protective film of gallium oxide that is formed over the surface by the action …showed first 75 words of 487 total…

…showed last 75 words of 487 total…vein in your arm, you will then be scheduled to return beetween 2 and 5 days later, depending on your diagnosis. Your initial scan can take several hours, while you lay on a stretcher, or imaging table, and a camera is positioned above you or below you, taking pictures as it moves slowely along the length of your body. No special preperation must be taken before the scan, and the gallium is usually excreted through the bowel.