The element mercury was known to ancient Egypt and China. They used it thinking it would prolong

* Recycling metals saves energy and our limited metal ores (and fossil fuels). The pollution from extracting metals is also reduced.

The elements were organized by Dimitri Mendeleév. He organized them by properties (columns), groups (horizontal), and atomic number (the number of protons and electrons). This became known as the Periodic Table. And currently there are 118 elements. He also found gaps in which elements that were yet to be discovered were to go, three of these unknown elements were found and identified in Mendeleév's lifetime. The elements today are used in everything and 75% of the 118 elements are metal.

Gallium was discovered by the French chemist Paul Emile Lecoq de Boisbaudran in 1875 in an examination of a sphalerite sample, and found it by its characteristic spectrum, its two violet lines. Lecoq named the element “gallia”, from the Latin word Gallia meaning Gaul, after his native land of France; he also named the element after himself (“le coq” is french for “the rooster”and the Latin word for rooster is “gallus”).

chemical element here on our own planet Earth. Though it is a rare, unreactive noble gas,

Mercury also came up in science class. When first presented with the jumble of the periodic table, I scanned for mercury and couldn’t find it. It is there—between gold, which is also dense and soft, and thallium, which is also poisonous. But

used for dental fillings for cavities. Subsequently in 1898, it was found to be radioactive.

As people found new normal assets underneath the Earth's surface, conventional weapons were swapped as techniques for metal-working created. Copper was the only metal known to human being from long time, so copper significantly contributed to the ancient world by helping cultures of Egypt, Rome, Indus, China grow. So copper replaced stone in weapons. The Sumerians was the first people use copper as a weapon, copper maces were in high demand at that time. Native American mostly uses knifes and flint spears but uses copper for the decoration in the ceremony. It was discovered by the ancient artisans that copper losses its edge easily, they can be sharpened without much difficulty. Despite of drawbacks of copper it was being used as weapon, along with maces, bow and arrow and slings was used. It was very much common to the hunters as it was very convenient to handle and target achieve the arrow was much accurate. After a discovery of pure copper in anatolia, its metallurgy spread in Egypt , Mesopotamia, India, China and Europe. Now the alloy of copper and tin was developed and used very much as it was much harder than copper. This also lead to the flourishment of the

The German alchemist, Albertus Magnus from the 13th century, is the man who is known for first identifying Arsenic. Being number 33 on the periodic table, arsenic falls inside the metalloid line because of its characteristics. According to the Green Facts website “Arsenic is a naturally occurring element that can be found in the Earth crust.” (Arsenic n.d.) It

Mercury is a rocky, gray planet that very closely resembles the Earth’s Moon on the surface. Mercury’s surface is full of craters, boulders, and pulverized dust. Its many craters can be tiny or massive. Mercury is geologically inactive, and has been for an extended amount of time. There is an absence of weather on Mercury, and it does not have an atmosphere. Because it has no atmosphere, it cannot control the variations in temperature from day to night, and the temperatures on the planet can range from 90 Kelvin to 700 Kelvin. There are no signs of clouds, rivers (or any other body of water), or dust storms on Mercury. What we know about Mercury and its surface is from information brought back by Mariner 10 and the Messenger mission in the last few decades.

As previously stated, mercury is number 80 on the periodic table of elements. It is a metal, a transition metal to be exact. It has a symbol of “Hg”, an atomic mass of 200.59, and there are 7 known stable isotopes

Some say yes and some say no, which is one of the controversy of amalgam. Mercury being toxic and considering that fillings are subjected to tooth pressure, wear factors and leaking risks, the possibility of mercury leaking into tooth sockets and poisoning patients had to be taken into consideration. Mercury poisoning depends on the patients age, build, gender, bone strength, blood regulation, and eating habits (ADA.org, 2009). So, as we can tell mercury is one of the disadvantages to dental amalgam. Other disadvantages include poor esthetic qualities, marginal breakdown, and long-term corrosion leading to replacement ("Dental Amalgam",

It is found in nature, and has anthropogenic sources, such as coal burning and mercury mining [1]. The major environmental threat of mercury to living organisms is due to its toxicity, bioaccumulation, and the bioavailability of the mercury chemical forms.

The origin of the second element on our periodic table still hasn’t fully been found, neither the many secrets that it holds. Helium is one of first know elements to every been discovered, and still is being examined and studied for any other hidden secrets that it might hold. While some people might believe that it’s a element that is hardly used, it would shock people to discover that as human beings, helium is a daily element that surrounds us not only just in the atmosphere, but is used for tons of different jobs and situations.

Mercury is one of the most interesting planets in the solar system. It is the closest planet to the sun in our solar system and has a very short orbitational period. Mercury has a very rough and rugged surface, has temperatures that range from 806 to -292 degrees fahrenheit, and has the biggest basin in the solar system, the caloris basin. As a result, Mercury is the most innermost planet in the solar system and scientist are still discovering new fascinating things about the planet

Mercury's surface is very similar to that of our very own moon. Just like our moon, It has a dark grey, rocky surface. It is known to be quite porous and covered in many craters. It is strewn with quite a few boulders and lots of dust. Interestingly enough, the lunar-like surface layer only runs about 500-600 kilometers deep into the small planet, where it meets Mercury's iron-rich core. As far as sustaining life, Mercury is geologically dead, and according to research done over the course of years, it has been for quite some time. This is apparent from its barren landscape, and lack of weather patterns. Data shows no record of dust storms, clouds or any form of weather, reassuring us of its similarity to our Earth's moon.