I never knew how the colors of a flame were created, and now I do. The book says that every atom has a unique arrangement of of electrons, and as a result gives of a unique color. These were the colors we saw in our flame tests. Things like fireworks are examples of these bursts of color. The structure of each atom is key to its color. Atoms each have “ladders” or energy laters that revolve around the nucleus. When an electron is exposed to energy, it rises in levels and when it drops back down, it gives of a specific color. The total amount of energy remains constant over the process because heat energy is gained and then given off as light energy, stabilizing the energy. These tests are not considered chemical reactions since the heat did not alter the compound on the splint. The green fire created by the copper substance was by far the coolest.
Polymers are cool because of their unique characteristics. The book stated that Isaac Newton was able to devise a model for fluid flow. Polymers are classified as non-Newtonian liquids because of their incapability to flow. Things such as ketchup, yogurt, blood, and gravy are considered polymers because of their physical properties. Polymers like slime share characteristics of both a liquid and a solid. Slime is fluid and takes the shape of its container, but can be broken apart and pulled like a solid. The chemical change of the PVA and the borax into slime is called polymerization. Polymers have always existed in nature, but have only been produced by humans in the twentieth century. Proteins are polymers. Proteins are made up of combinations of amino acids. Our bodies are able to break the bonds of these acids and create energy from them; pretty cool. Polymers are used in everyday life, which most people will probably never know.
2. If you do not prevent the oxidation of metals used in construction, the structure could weaken due to the build up of rust and maybe even collapse.
3. Metalloids are solids that share characteristics of both metals and nonmetals. They can be either shinny or dull, and can even be either a semiconductor or not a semiconductor.
4. Alloys are materials that contain more than one element. They are still classified as metals, but are not elements. They still maintain the characteristics of metals.
5. Alloys are used to replace fragile metals such as gold, silver, and copper. Alloys hold their shape and are harder. Alloys are used in construction to make building stronger.
Chem to Go:
a. Luster and Color.
b. Electrical conductivity and ductility
Aluminum – Metal
Iron – Metal
Boron – Metalloid
Oxygen – nonmetal
Carbon – nonmetal
Silicon – Metalloid
Mercury – Metal
Metals, compared to liquids and gasses, are pretty cool. They conduct electricity and heat and are pretty tough to beat up. It was cool learning about the particle structure of metals and how their metal nuclei are in fixed positions while their electrons are mobile. Now that I know more about rust, it will be easier in the future to prevent corrosion and the destroying of my tools, etc. In my opinion, alloys are the coolest type of metal. They are a combination of metal elements that maintain the characteristics of a normal metal, which make them cooler. Hopefully when we experiment with these metals, we get the chance to see how they react with heat or electricity. Now I truly understand the significance of frying pans and the chemistry behind them.