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Gallium
Beginning of essay
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 . Its properties closely
match those predicted by Mendelev.
Gallium, atomic number 31, is ve ....
Middle of essay
....ic. Natural gallium consists of a mixture of two stable isotopes:
gallium-69 ( 60.4 percent ) and gallium-71 (39.6 percent ).
Somewhat similar to aluminum chemically, gallium slowly oxidizes in
moist air until a protective film forms, and it becomes passive in cold nitric
acid.
Gallium has been considered as a possible heat-exchange medium in
nuclear reactors, although it has a high neutron cross section. Radioactive
gallium-72 shows some promise in the study of bone cancer; a compound of t.... |
| Number of words: 487 |
Approximate pages: 2 |
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