Discuss one major difference between the classical theory of the atomic model and the quantum theory model in our understanding of the atomic structure.
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Discuss one major difference between the classical theory of the atomic model and the quantum theory model in our understanding of the atomic structure.
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- Chemists in the 19th century constructed an evacuated glass tube with wires inserted in both ends. When an electrical current was generated at the anode, a 'cathode ray' would pass to the cathode creating a fluorescent glow. These experiments helped chemists better understand the nature of the electron. J.J. Thomson added a magnetic field to a cathode ray tube to show that the ray would bend. His experiments demonstrated that the rays were negatively charged particles. He then calculated the mass to charge ratio of the electric ion (electron). According to his calculations, how massive was the electron relative to the hydrogen ion? Voltage Source A) The same size B) ~1000 times larger C) ~1000 times smaller + S D) ~10 times larger Anode Cathode E) ~10 times smallerThe Bohr model of the atom was an important discovery that led to the modern theory of atomic structure. (i) Describe the Bohr atomic model and (ii) explain the observations that led to the creation of the model.Explain the organization of an atom of carbon.
- Much of the evidence for the existence of atoms comes from Multiple Choice chemistry. mechanics. biology. thermodynamics. On-Screen KeyboardIllustrate the electron spin quantum number of CarbonHypothetical elements X and Y form a molecule XY2, in which both Y atoms are bonded to atom X (and not to one another). The X—X distance in the elemental form of X is 204 pm, and the Y—Y distance in elemental Y is 168 pm. What would you predict for the X—Y distance in the XY2 molecule? Explain your answer.
- The periodic table is the most important organizing principle in chemistry. There is a regular progression in the periodic table that reflects a similar regularity in the structures and properties of the different elements. If you know the properties of any one element in a group, you can make a good guess at the properties of every other element in the same group and even the elements in neighboring groups. Familiarizing yourself with the structure and arrangement of the periodic table early on will help you later on in chemistry. Part A Classify the following elements as main group elements, transition metals, or inner transition metals. Drag the appropriate elements to their respective bins. ► View Available Hint(s) Main group elements Submit Ca Sn Fm Pd Zn S Transition metals Inner transition metals Reset HelpList the general properties of metals, nonmetals, and metalloid elements found in the Periodic Table of Elements. Give two examples of metals, metalloids, and nonmetal atoms.Natural radioactivity is due to the decay of unstable nuclei. Radioactive atoms are called radioisotopes and their nuclei are called radionuclides. The diagram below shows an important experiment that Rutherford did to detect three main types of radiation (alpha, beta, and gamma). He observed what happened to a single beam of mixed radiation when it was aimed through an electric field. On the blanks next to each beam, predict what type of radiation is represented
- How has the understanding of the structure of the atom changed over time? Briefly describe the research, findings, and the atomic model of at least two (2) significant scientists in the history of the development of modern atomic theory.Four neutral objects are sketched below, in black and white. There are positive and negative electric charges inside these objects, and at least some of those charges can move around. Now suppose a negative charge comes close to these objects, as shown in the sketch. Shade the objects red anywhere you expect them to become more negatively charged, and shade the objects blue anywhere you expect them to become more positively charged.In a 1911 paper, Ernest Rutherford said: In order to form some idea of the forces required to deflect an alpha particle through a large angle, consider an atom containing a point positive charge Ze at its center and surrounded by a distribution of negative electricity, – Ze uniformly distributed within a sphere of radius R. Derive an expression for the magnitude of the electric field at the center of the atom. - Express your answer using the parameters +Ze and -Ze.