Match each definition in Column A with the term in Column B. Column B 4 Understanding Main Ideas (Part A) CHAPTER Name 1. atomic number 65 Class Reviewing Vocabulary The Structure of the Atom CHAPTER Name Copyright © Glencoe/McGraw-Hill, a division of the McGraw-Hill Companies, Inc. T168 Chemistry: Matter and Change Chapter Assessment Answer Key CHAPTER Name 4 Date CHAPTER ASSESSMENT Class of protons is 4 8. Isotope in which the difference between the neutrons and number 7. Chromium with two more neutrons than its number of
1.23 C. 5.74 X 10-4 D. 0.658 _____ 14. Which of the following is true for the following voltaic cell? Zn (s) ( Zn2+(aq) (( Cr3+ (aq) ( Cr (s) A. The electrons flow from cathode to the anode. B.
Answer: The TCP/IP protocols were initially developed as part of the research network developed by the United States Defense Advanced Research Projects Agency it was created for a number of different protocols but had many flaws and was adapted for more of a business and house hold use Lab 3.2 1 How does the abstraction of the physical layer facilitate interoperability across networks using different types of physical wires? Answer: It is according to the kind of wire and how it is made up of, E.g. Copper Fiber optics. The physical layer includes electrons. The faster this can move back and forth from one point to another, the faster data is transferred, to have proper connection is just as important as the wire themselves to make a smooth transfer.
Using the Flame Test to Prove Different Colors of Light are Emitted as the Electrons Move from an Exited State Back to a Ground State 1. Introduction / Purpose (5 points) According to Mr. Darrell Ebbing and Mr. Steven Gammon (2013, p. 273) Albert Einstein “reasoned that if a vibrating atom changed energy, from 3hv to 2hv, it would decrease in energy by hv and this energy would be emitted as a quantum of light energy.” The reasoning was based on “Mr. Max Planck’s work on Quantization of Energy (Ebbing & Gammon, 2013, p. 273)”. In this experiment, this reasoning will be tested by taking small amounts of four different salts that contain metal, Sodium Chloride (NaCl), Potassium Chloride (KCl), Lithium Chloride (LiCl), and Barium Chloride (BaCl_2), and heating them using the flame of a Bunsen burner. As Model Science (2011) explains, the experiment will show that as the salt with the metal is “burned, the electrons will be excited (i.e., move to another energy level) and as these electrons fall back from one energy level to another, they will emit photons of light.
Figure 2 shows a circuit with a resistor R = 1.0 × 103 Ω, and a battery with potential difference of VB = 5.0V . (a) Solve the circuit in Figure 2. That is, find all unknown currents, voltages, and resistances. (b) What is the direction of the current? Note: I want the direction of the conventional current.
When the electron returns to a lower level, a photon with that energy difference is emitted. The peaks in the emission spectra are very sharp and known as line spectra. This emission spectra can be used in identification of elements because the spectra is different for each element. Materials: 1. Spectrum tubes (known and unknown) 2.
Humanity achieved a lot in the years leading up to World War II and the years following. But even with all the great inventions of our time, the Manhattan Project remains the greatest scientific breakthrough of the twentieth century. Work Cited Kelly. The Manhattan Project: The Birth of the Atomic Bomb in the Words of Its Creators, Eyewitnesses, and Historians. New York: Black Dog and Leventhal Publishers, 1995.
Radiographic film on the opposite side of the source is exposed when it is struck by radiation passing through the objects being tested. More radiation will pass through if there are cracks, breaks, or other flaws in the metal parts and will be recorded on the film. By studying the film, structural problems can be detected. Co-60 is used because it is an emitter of gamma rays which will penetrate metal parts. Co-60 has a half-life of 5.3 years and can be used in a chemically inert form held inside a sealed container.
Explanation linked to experimental data and research. Detailed scientific explanation given of relationships between current, voltage, resistance, gauge and cross-sectional area, based on research and experimental data. Relationships linked to original hypothesis. Considers effects of distance and diameter on sound quality, explaining how these can be altered to result in good quality sound. * No evidence of achievement for this quality, or evidence insufficient for the award of 1 mark.
Leavitt completed her research on period/luminosity by 1912 and astronomers such as Hubble, and Shapley have since used her work. “The period/luminosity law became the yardstick by which distances of stars could be measured by astronomers” (Nix, 1998). Without Leavitt’s work, which went unpraised and mostly unrecognised throughout her life, many of the early advances in astronomy would not have happened. References: Mitchell, Helen Buss. 1976.