+ 1-888-787-5890  
   + 1-302-351-4405  

Essay/Term paper: Gallium

Essay, term paper, research paper:  Science Research Papers

Free essays available online are good but they will not follow the guidelines of your particular writing assignment. If you need a custom term paper on Science Research Papers: Gallium, you can hire a professional writer here to write you a high quality authentic essay. While free essays can be traced by Turnitin (plagiarism detection program), our custom written essays will pass any plagiarism test. Our writing service will save you time and grade.


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 of the acid.
Gallium does however dissolve in other acids, and alkalies.

Gallium was discovered (1875) by Paul Emile Lecoq de Boisbaudran, who
observed its principal spectral lines while examining material seperated from
zinc blende. Soon after he isolated the metal studied its properties, which
coincided those that Dmitrii Ivanovich Mendelev had predicted a few years
earlier for eka-aluminium, the then undiscovered element lying between aluminum
and indium in his periodic table.

Though widely distributed at the Earth's surface, gallium does not occor
free or concentrated in independant minerals, except for gallite. It is
extracted as a by-product from zinc blende, iron pyrites, bauxite, and

Silvery white and soft enough to be cut with a knife, gallium takes on a
bluish tinge because of superficial oxidation. Unusual for its low melting
point ( about 30 degrees C, 86 degrees F ), gallium also expands upon
solidification and supercools readily, remaining a liquid at temperatures as
low as 0 degrees C ( 32 degrees F ).

Gallium has the longest usefull liquid range of any element. The liquid
metal clings to glass and similar surfaces. The crystal structure of gallium
is orthorhombic. 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

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 this
isotope is absorbed by the cancerous portion of the bone.

The most common use of gallium is in a gallium scan. Gallium scans are
often used to diagnose and follow the progression of tumors or infections.
Gallium scans can also be used to evaluate the heart, lungs, or any other organ
that may be involved with inflammatory disease.

A gallium scan usually requires two visits to the Nuclear Medicine
Department. On the first day you recieve an injection in a 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.


Other sample model essays:

Science Research Papers / Geothermal Energy
Geothermal Energy Matt Arnold 9/17/96 Physics 009 Professor Arns The human population is currently using up its fossil fuel supplies at staggering rates. Before long we will be force...
Science Research Papers / Albert Einstein 1879-1955
Albert Einstein 1879-1955 Einstein was undoubtedly the single greatest contributor to science in the 20th century. Few will argue with that point. His gifts to today's understanding of th...
Science Research Papers / Ideal Gases Vs. Real Gases
Ideal Gases vs. Real Gases An ideal gas is a theoretical gas which perfectly fits into the equation PV= nRT. An ideal gas is different from a real gas in many ways. An ideal gases' mass ca...
Science Research Papers / Insulation
Insulation Introduction The experimenter is testing on denim, cotton T-shirt material, wool fabric, thermal underwear, polyester fabric, and a Ziplock bag with no insulator. From resea...
Science Research Papers / Intermolecular Bonding Essay
Intermolecular Bonding Essay Write an essay on intermolecular bonding. Explain how each type of bond arises and the evidence for the existence of each. Comment on their strengths in relatio...
Involvement of K+ in Leaf Movements During Suntracking Introduction Many plants orient their leaves in response to directional light signals. Heliotropic movements, or movements that are...
Science Research Papers / Iron
Iron Iron in its pure state is soft, malleable and ductile (that can be stretched, drawn or hammered thin without breaking ((Webster's Dictionary, 419, 1988)) with a hardness of 4-5. It i...
Science Research Papers / Lab Protocols
Lab Protocols Through trial and error my class and I have learned that screwing around and misbehaveing in lab not only results in multiple page papers, but can also be harmful, danger...
Science Research Papers / Aristotle
Aristotle Aristotle was a Greek philosopher and was born in 348 B.C. He studied under another philopsopher Plato and later tutored Alexander the Great at the Macedonian court. In 335 B.C...
Biography Term Papers / Alfred Binet
Alfred Binet The following essay offers both a short biography of Psychologist Alfred Binet and a present day practical application using the theory from which Binet developed his Intellige...
Experience with Dream Essay - Reliable and great customer service. Quality of work - High quality of work.
Browns Mills, New Jersey, United States
Dream Essay - Very reliable and great customer service. Encourage other to try their service. Writer 91463 - Provided a well written Annotated Bibliography with great deal of detail per the rubric.
Browns Mills, New Jersey, United States
it is always perfect
Frederick, Maryland, United States
The experience with Dream Essay is stress free. Service is excellent and forms various forms of communication all help with customer service. Dream Essay is customer oriented. Writer 17663 is absolutely excellent. This writer provides the highest quality of work possible.
Browns Mills, New Jersey, United States
Only competent & proven writers
Original writing — no plagiarism
Our papers are never resold or reused, period
Satisfaction guarantee — free unlimited revisions
Client-friendly money back guarantee
Total confidentiality & privacy
Guaranteed deadlines
Live Chat & 24/7 customer support
All academic and professional subjects
All difficulty levels
12pt Times New Roman font, double spaced, 1 inch margins
The fastest turnaround in the industry
Fully documented research — free bibliography guaranteed
Fax (additional info): 866-332-0244
Fax (additional info): 866-308-7123
Live Chat Support
Need order related assistance?—Click here to submit a inquiry
© Dreamessays.com. All Rights Reserved.
Dreamessays.com is the property of MEDIATECH LTD