Sustainable Energy
2nd Edition
ISBN: 9781337551663
Author: DUNLAP, Richard A.
Publisher: Cengage,
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Chapter 6, Problem 15P
To determine
Find whether the isotopes are fissile or not.
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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
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: 10
Two hypothetical metals are created with different elements that have the same atomic mass (g/mole) and the same atomic radius. Metal A has a densityof 9.50 g/cm3 and metal B has a density of 8.73 g/cm3. If one of these metals has a BCC lattice structure and the other has an FCC lattice structure, identify the structure that corresponds to each of one of them. Justify your answer.
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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?arrow_forwardTwo hypothetical metals are created with different elements that have the same atomic mass (g/mole) and the same atomic radius. Metal A has a density of 9.50 g/cm3 and metal B has a density of 8.73 g/cm3. If one of these metals has a BCC lattice structure and the other has an FCC lattice structure, identify the structure that corresponds to each of one of them. Justify your answer.arrow_forwardA hypothetical metal A with a BCC lattice structure has a density of 8.87 g/cm3 If a hypothetical metal B with an FCC lattice structure is created with a different element that has almost the same atomic mass (g/mole) and almost the same atomic radius, what is the density of metal B? Justify your answer.arrow_forward
- 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-39arrow_forwardTwo hypothetical metals are created with different elements that have thesame atomic mass (g/mole) and the same atomic radius. Metal A has a density of 9.50 g/cm3 and metal B has a density of 8.73 g/cm3 . If one of these metals has a BCC lattice structure and the other has an FCC lattice structure, identify the structure that corresponds to each of one of them. Justify your answer.arrow_forwardUsing the information available in Table 2.3, calculate the density of molyb-denum given that it has an atomic mass of 95.94 g/mole.arrow_forward
- 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 answerarrow_forwardThe volume of tetrachloride having a mass of 1200 kg is 0.952 m^3. Compute the mass density and specific gravity.arrow_forwardThe 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?arrow_forward
- Metal X has an atomic weight of 43.1 g/mol, theoretical density of 6.40 g/cm^3, and atomic radius of 122 pm. Determine whether the crystal structure of Metal X is BCC, FCC, or simple cubic. Provide your complete solution.arrow_forwardCalculate the theoretical density of Cao, given that it has the rock salt crystal structure (see Figure 3). Take the radius of the Calcium and oxygen ions to be 0.1 and 0.14 nm, respectively. The Atomic Weight (g/mol) of Calcium is 40.07, whilst oxygen is 16.00. Figure 3. A unit cell for the calcium oxide (CaO), crystal structure Select one: a. 8.417 g/cm3 b. 1.683 g/cm3 c. 3.367 g/cm3 d. 4.489 g/cm3arrow_forwardA 325 L of carbon tetrachloride weighs 500 kg. a. Calculate its density. b. Calculate its specific weight c. Calculate its specific gravity.arrow_forward
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