The Properties of Tradition Metals Essay

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Transition metals are a group of metals that are considered dense and have high melting and boiling points. They are located between the alkaline earth metals group and the boron group. The transition metals are characterized by the number of inner energy levels that are occupied by the atoms. They are then separated into 2 groups: d-type transition metals and f-type transition metals. D-type transition metals are mostly consisted of important metals (commercially) and the rare and unimportant metals. They are ranged from very reactive to noble. The metals in this group all form a variety of different alloys. The f-type transition metals consists of lanthanides (rare earth metals) and actinides which is from thorium to lawrencium. These…show more content…
Although this may be a lot, there is a lot of gold in the rock veins. In fact, more than half of the world’s total production of gold is using vein mining. Gold has been used for medicine and dentistry can be dated back for thousands of years. The earliest record of medical use of gold was by the Chinese in 2500 B.C. For dentistry, the earliest use would be for using gold wire to secure substitute teeth and were used by the Etruscans. Since gold is malleable and resistant to corrosion, it is ideal to be used in dentistry. Most of the 20th century, gold has been used in medicine. For example, medicines that treat rheumatoid arthritis contain gold. It has also been used in the treatment of cancer. Gold is also used for implants as well as treating facial nerve paralysis. Gold is ideal for implants because they are very resistant to bacteria.

Lagophtalmos is the inability to close the eyelids completely. The word lagopthalmos comes from the Latin word meaning hare. This is because like a hare, a person cannot close their eyes completely during sleeping. This is caused by a facial nerve paralysis. The most common type would be Bell’s palsy vascular lesion. Blinking is an essential in keeping our body healthy. When blinking, the tear film spreads over the ocular surface and allows for there to be moisture in the eye. When someone is unable to close the eyelid, it can lead to many corneal problems like blindness, bacterial infection and many others. Although there are
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