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Periodic table science
Periodic table science
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More handpicked essays just for you.
Periodic table science
Periodic table science
Don’t take our word for it - see why 10 million students trust us with their essay needs.
Cassie Droelle 1510-01501 Chemical Equation 2 Visualizing Stoichiometry – Inquiry Lab Cassie Droelle 1510-01501 4-18-16 Introduction The purpose of this lab is to determine the complete balanced equation of a metathesis reaction with an unknown metal ion by first experimentally identifying the metal ion and then using stoichiometry to determine the rest of the equation. Stoichiometry is “the process by which quantities in a chemical reaction are compared” and is based on the Law of Conservation of Mass (1). The Law of Conservation of Matter “dictates that the mass of the reactants and mass of the products must be equal” (1).
Potassium ion is a positive ion in the hydrate compounds (K+). 67. Dalton’s perception of potassium aluminum sulfate is different from what is known today because Dalton’s structure does not show the hydrogen elements that are included in the hydrate. 68. percent composition by mass of water =
New elements continue to be added to the periodic table as science knowledge increases. In January of 2016, a news article reported elements with atomic numbers 113, 115, 117 and 118 as approved by the International Union of Pure and Applied Chemistry. These elements completed the seventh row of the periodic table. Isdell shows the concept that chemistry continues to expand when Julie names an element in the Land of Science that did not previously exist, Wendelium with the atomic symbol Wd (Isdell, 442).
Prove if the material in cup 6 is a metal, metalloid, or nonmetal, by using its appearance, color, state of matter, luster, conductivity, malleability, and how it reacts with HCL. Before beginning to test on the substance we observed its appearance, state of matter, luster, and color. The substance was very shiny, solid and hard, as well as silver. Then we put on safety goggles to start testing.
The __average atomic mass__ of an element refers to the atomic masses of the isotopes of the element, taking into account the different abundances of the element’s isotopes. The average atomic mass can be calculated using the following
Which of the following unit is used to indicate mass? a. Cm3 b. Um c. Mg d. mL 21. Which of the following demonstrate a chemical reaction of water?
Atoms are the basic building blocks of all matter(Doc.3). These small particles have a nucleus and a certain number of protons ,neutrons ,and electrons(O.I). The number of protons is independent to the element, and can be used to find it on the periodic table(Doc.2). Protons are positively charged particles(Doc.3).
Based on observations, the unknown metal was very dark and black in color, as well as flaky in terms of texture and shape. Because it was clearly observed that the unknown metal was black in color, several of the possible choices can be eliminated. To reduce error, it is critical to eliminate choices carefully and with confidence. Copper can be eliminated because of its red hue, while cobalt is not a possible match due to its blue color. Bismuth can also be eliminated since it contains a variety of colors, and so this element cannot be the match because as previously stated, the unknown metal was only black in color.
(“Facts About Lead”) On the periodic table I am in column 14 and row 6. My atomic number is 82. When I stepped on the scale the other day my atomic weight was 207.2. My family is the Carbon group and I am classified as a metal.
“The Nuclear Waste” In the essay “Nuclear Waste” author Richard A. Muller the main point is the danger of nuclear waste and how politics and Scientific are handling the situation. Politicians and scientists are in favor of more research to found out answers because they both share the responsibility for the nuclear waste. There are many discuss nuclear waste whether you are pro-nuke or anti-nuke and how dangerous could be. An interesting fact is that Muller claims that Colorado River water is more dangerous than storing the nuclear waste also that uranium will progressively become less radioactive.
As Primo Levi tells of his trial and tribulations before, during, and after the holocaust in The Periodic Table, he expresses each story through identifying with elements in the Periodic Table. In this way, he exemplifies scientifically, a paradigm for understanding how the world works. In some chapters, the element serves as a reminder of an incident in Levi’s life, but in others the element serves as a metaphor or symbol to dramatize a specific period in Levi’s past. In the chapter “Argon”, he compares the members of his family to the inert gases in the Periodic Table. He states that his ancestors present many similarities to the gases.
While arguably one of the defining psychological studies of the 20th Century, the research was not without flaws. Almost immediately the study became a subject for debate amongst psychologists who argued that the research was both ethically flawed and its lack of diversity meant it could not be generalized. Ethically, a significant critique of the experiment is that the participants actually believed they were administering serious harm to a real person, completely unaware that the learner was in fact acting. Although Milgram argued that the illusion was a necessary part of the experiment to study the participants’ reaction, they were exposed to a highly stressful situation. Many were visibly distraught throughout the duration of the test
The atomic theory has came a long way since its first development. Having several scientist contribute to the theory creating the atomic theory that we know today. Since its creation by Democritus scientist have contributed to the learning of atoms to develop the atomic theory allowing us to know all that we know today. With several scientist working to create and modify the atomic theory, Democritus is credited with the creation atomic theory, being alive around 460 BC -370 BC, he was the first person to theorize the existence of the atom. Democritus theory stated that the universe and all matter obey certain principles.
Atoms are made up of two major sections, the nucleus and the electron cloud. Electrons are found in the electron cloud, and the nucleus is made up of protons and neutrons. Protons are positively charged, while neutrons have no charge, and are slightly more massive than the protons. It used to be thought that protons and neutrons were solid, fundamental particles. It turns out, however, that they are made up of something even smaller.
Historiographer Elphinstone took up as a mission of the refutation of Mill’s view, although he regarded Mill’s history as ingenious, original and elaborate. He was conscious of the fact that Mill had subordinated his history to the enunciation of a principle which was essentially European in concept, but the real history of India could also be written by a direct contact with Indian situation and conditions. In other words it is one thing to write the history of a land, which one has never visited, on the basis of a particular ideology, and altogether a different thing to be in that land for over two decades, watch the flow of its life from a discerning eye, weigh in the balance all pros and cons of a society’s culture, and then write its