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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- Period 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?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/nucleonvvnat 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: 10
- 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, seconds1. 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-39Calculate 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 = 3
- Two 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 cmNuclide 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]RTC means? * Your answer For the particles of an atom, which two particles have the same mass? * PROTON NEUTRON ELECTRON BORON NUETRON IRON This is a required question Is the effect of temperature on all materials the same? Yes or no. * Your answerHemoglobin 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.