Determine the number of protons and neutrons in each isotope Na 11 protons, 12 neutrons O 12 protons, 12 neutrons 12 protons, 10 neutrons 11 protons, 11 neutrons
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- Find the average binding energy per nucleon of 2 Mo and 82 Kr. (For the atomic masses, see this table. Enter your answers to at least two decimal places.) 42 36 (a) 92 Mo 42 MeV/nucleon 82 (b) Kr 36 MeV/nucleonPeriod 6 is unusual in several ways.(a) It is the longest period in the table. How many elements be-long to Period 6? How many metals?(b) It contains no metalloids. Where is the metal/nonmetal boundary in Period 6?Explain which kind of microstructures you expect to observe at room temperature if an iron-carbon alloy of eutectoid composition is cooled down following the red and blue curves. 800 727° 700 Coarse pearlite 600 a+ FeC Fine pearlite 500 y+ a+ Fe,C 400 Bainite 300 M5- 200 so - Mo 100 1 sec 1 min 1 hour 1 day 102 103 104 105 0.1 10 Time, seconds
- vvnat is the number of protons, neutrons, and electrons for element has; atomic number 9, mass number 18, charge of 1- Op: 9; n: 9; e: 12 Op: 9; n: 9; e: 8 Op: 9; n: 9; e: 9 Op: 9; n: 9; e: 10Calculate the wavelength of light emitted when each of the following transitions occur in the hydrogen atom. What type of electromagnetic radiation is emitted in each transition? a. n = 4 → n = 3 b. n = 5 → n = 4 c. n = 5 → n = 3Two similar round bars A and B are each 30 cm long as shown in the given figure. The ratio of the UB energies stored by the bars A and B, is UA 12 cm- |2 cm- EL4 cm 4cm A 20 cm 10 cm| 10 cm 20 cm
- 1. Give the number of protons, the number of neutrons, and the neutron-to-proton ratio for each isotope. a. iron-57 b. 185W r notassium-39Nuclide A has a half-life of 4 days, and nuclide B has a half-life of 16 days. At the beginning of an experiment, a sample contains 218 nuclei of nuclide A and 212 nuclei of nuclide B. How long will it take before the numbers of nuclei of the two nuclides are equal?What is the term for the process by which a radioactive nucleus emits an alpha particle consisting of two protons and two neutrons? a) Alpha decay b) Beta decay c) Gamma decay d) Electron capture.
- (a) What is the physical significance of energy of activation ? Explain with diagram.(b) In general, it is observed that the rate of a chemical reaction doubles with every 10 degree rise in temperature. If the generalization holds good for the reaction in the temperature range of 295 K to 305 K, what would be the value of activation energy for this reaction ?[R = 8.314 J mol-1 K-1]Hemoglobin in our blood exist in two predominant forms.one form,known as oxyhemoglobin, has oxygen bound to the iron and the other,known as deoxyhemoglobin has water molecule bound instead.Oxyhemoglobin is a low spin complex that gives arterial blood its red colour, and deoxyhemoglobin is a high spin complex that gives venus blood its darker colour.Explain these observations in terms of the crystal field splitting.The nucleus of an atom can be modeled as several protons and neutrons closely packed together. Each particle has a mass of 1.67 x 1027 kg and radius on the order of 10-15 m. (a) Use this model and the data provided to estimate the density of the nucleus of an atom. (b) Compare your result with the density of a material such as iron (p = 7874 kg/m3). What do your result and comparison suggest about the structure of matter?