Textbook Question
(b) Using the mass of the proton from Table 2.1 and assuming its diameter is 1.0 * 10-15 m, calculate the density of a proton in g>cm3.
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Ch.2 - Atoms, Molecules, and Ions
Chapter 2, Problem 93a
The nucleus of 6Li is a powerful absorber of neutrons. It exists in the naturally occurring metal to the extent of 7.5%. In the era of nuclear deterrence, large quantities of lithium were processed to remove 6Li for use in hydrogen bomb production. The lithium metal remaining after removal of 6Li was sold on the market. (a) What are the compositions of the nuclei of 6Li and 7Li?
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Identify the atomic number of lithium (Li), which is 3. This means every lithium atom has 3 protons in its nucleus.
Determine the number of neutrons in the nucleus of 6Li. The mass number of 6Li is 6, which is the sum of protons and neutrons. Subtract the number of protons (3) from the mass number (6) to find the number of neutrons: 6 - 3 = 3 neutrons.
Write the composition of the 6Li nucleus: it contains 3 protons and 3 neutrons.
Determine the number of neutrons in the nucleus of 7Li. The mass number of 7Li is 7. Subtract the number of protons (3) from the mass number (7) to find the number of neutrons: 7 - 3 = 4 neutrons.
Write the composition of the 7Li nucleus: it contains 3 protons and 4 neutrons.
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The nucleus of 6Li is a powerful absorber of neutrons. It exists in the naturally occurring metal to the extent of 7.5%. In the era of nuclear deterrence, large quantities of lithium were processed to remove 6Li for use in hydrogen bomb production. The lithium metal remaining after removal of 6Li was sold on the market. (b) The atomic masses of 6Li and 7Li are 6.015122 and 7.016004 u, respectively. A sample of lithium depleted in the lighter isotope was found on analysis to contain 1.442% 6Li. What is the average atomic weight of this sample of the metal?
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