The Russian scientist’s first table included missing, unknown elements, which he correctly predicted the properties of. In Mendeleev’s lab the given properties of known and unknown elements included density, hardness, conductivity, melting point, solubility, and color, and only sometimes given the physical state (if not given, we observed the physical state). We also knew the group numbers in which the unknowns were to be placed and…
The purpose of this report and lab was to assist in visualizing the structure of infinitesimally small objects and how they fit together. Normal object fit together similarly to microscopic atoms and experiment 2 exploits this to help understand structure property relationships. The knowledge gained here directly applies to the world as applications of the materials becomes apparent as the properties are explored. Copper…
Ernest Rutherford’s model of the atom suggested the atom had a small, compact nucleus surrounded by a cloud of almost weightless electrons. Bohr proposed adding to the model the new idea of quanta put forth by Max Planck in 1901. That way, electrons existed in set levels of energy, that is, at set distances from the nucleus. His model was a huge leap forward in making theory fit experimental evidence that other physicists had found over time.…
2.5 – Nuclear Physics What was initially known about the model of the atom before Thomson and Rutherford conducted their experiments? The first model of the atom is thought to have come from two Greek philosophers - Democritus and Leucippus – in the fifth century BC. These two philosophers believed that everything was made up of matter, and that you could half a given portion of matter (and keep halving the product) and eventually be left with something that couldn’t be halved again: the atom. They believed that all atoms were imperishable and could not be split apart.…
One of the most important scientific discoveries is that of the atom. The Atom is the smallest unit of matter. “Atoms are mostly empty space” (OI/ https://www.thoughtco.com/interesting-facts-about-atoms-603817). It makes up all the four elements. “There are over 100 different kinds of atoms ”(OI/https://www.thoughtco.com/interesting-facts-about-atoms-603817).Over time the theories about the atom have changed a lot, moving from simple to complex.…
Miller-Urey Experiment The goal of the Miller-Urey experiment was to recreate the “primordial soup” that was the Earth's early oceans. In the atmosphere, the chemicals H2O, CH4, NH3, and H2, or water, methane, ammonia, and hydrogen. Electrical storms were also very common at this point in time, and Miller and Urey's goal was to recreate these circumstances as accurately as possible in order to see if life would currently form under these conditions. They set up a fairly simple contraption that would recreate the early ocean, as well as part of the water cycle and electrical storms.…
For part 2 of the experiment (please refer to next page for Figure 3), Figure 3 shows a graph comparing the absorbance readings of the Glutamate-pyruvate aminotransferase serum with the time in minutes. A similar rate was predicted to occur for both the assays done. This would be characterized by the readings showing two parallel lines on the graph. However, the two first readings did not demonstrate this. This could possibly be due to different and insufficient amounts of NADH+ being added to the serums, which would mean that the reaction would not occur as fast as normal and at different rates.…
Day 2 of the experiment utilized Figure 5 to determine the metal cations present in an unknown solution #112. Each metal cation was confirmed or denied with ease, with the 2 cations present within Unknown #112 were correctly identified. Thus, Figure 5 was an accurate schematic to implement in this experiment.…
The impossibility reinforced the theory's indeterminacy. The experiment helped Bohr's case since it showed how Einstein’s experiment was a…
Today we might know an atom being the smallest piece of an element that represent an element, but you might not know the whole story. It all being in 1803, when a curious guy, known as John Dalton, who proposed an “atomic theory” with spherical solid atoms based upon measurable properties of mass. Later on Dalton introduced his belief that atoms of different elements could be universally distinguished based on their varying atomic weights. John Dalton's research not only changed the face of chemistry but also initiated its progression into a modern science.…
“Ambition is the first step to success. The second step is action.” In the Autobiography of Benjamin Franklin and Straws Into Gold by Sandra Cisneros, they are “ambitious of obtaining,” the success they work for (Franklin 6). In Comparison, they strive to be the best and go against the normality of their times to achieve success. There is also contrasting parts in the two passages involving how Franklin depends on others to reach success whereas Cisneros is independent.…
In the short stories “Straw into Gold” by Sandra Cisneros and the autobiography of Malcolm X by Malcolm X, the theme of overming the battles of life is prevalent through the use of pathos. Using emotion and sentiments to bring the readers the feeling of being at the same situation as they were. The main target of these two short stories were young people who have ever felt by their own in a conflict situation. Sandra cisneros could encourage the readers sharing her surpise of having done everything she did: “ I’ve done all kinds of things I didn’t think I could do since then” (Cisneros 99). She felt emotional at the moment she realized that even being a latin girl, and having all the obstacles she had passed through, she…
In the case study of Gilbane Gold, David Jackson, the engineer responsible for waste treatment in Z-Corp, was put in a very difficult situation. In the beginning, David was getting results from Frank’s waste water discharge tanks that showed that they have been releasing arsenic and lead at higher levels than what the city allows. The waste water ends up into the popular and profitable sludge product called Gilbane Gold. Gilbane Gold is sold as a fertilizer to farmers for about 75 years. David mentions his concern of this in the monthly meeting.…
This paved the way for progress because now scientists could define an element later to create the periodic table of elements. A secondary way to look at information to look at information in new ways to pave the way for progress. Finally You can learn from scientists in the past. Dimitri Mendeleev also created the periodic table of elements.…
Among his many accomplishments he named and characterized many aspects of radioactivity. He, therefore, developed the language that is in use today to describe radioactivity and atomic theory (The Discovery of Radioactivity). This man helped shape nuclear chemistry and he even created the planetary atom model. Rutherford is also famous for his experiment of gold foil. Rutherford 's experiments, in which he bombarded gold foil with particles (alpha particles) from a radioactive source, led to the understanding of the atom.…