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3. Which of the following options below is the main process by which elements heavier than iron are built up? a. nuclear fusion b. hydrogen burning c. neutron capture d. CNO cycle

3. Which of the following options below is the main process by which elements heavier than iron are built up? a. nuclear fusion b. hydrogen burning c. neutron capture d. CNO cycle

Applications and Investigations in Earth Science (9th Edition)
Applications and Investigations in Earth Science (9th Edition)
9th Edition
ISBN:9780134746241
Author:Edward J. Tarbuck, Frederick K. Lutgens, Dennis G. Tasa
Publisher:Edward J. Tarbuck, Frederick K. Lutgens, Dennis G. Tasa
Chapter1: The Study Of Minerals
Section: Chapter Questions
Problem 1LR
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1. Atomic weights of elements are computed from the weighted average of the abundances of its isotopes. In radioactive elements, why is there a problem with quantitating their atomic weights? (Choose all that apply.) more than one answer can be chosen a. Radioactive elements have varying isotope abundances through time. b. Radioactive elements tend to decay so will have varying weights at any one point. c. Radioactive elements are only found in the stars and so are inaccessible to us. d. Radioactive elements are incorporated in the universal entropy making them difficult to study. 2. How is nuclear stability related to the abundance of elements? a. Nuclear bombardment tend to destroy nuclear stability b. A more stable nucleus will not decay easily, and so will tend to be more abundant. c. An element may have a lot of precursors contributing to its abundance. d. Supernova explosions destabilize elements. 3. Which of the following options below is the main process by which elements heavier than iron are built up? a. nuclear fusion b. hydrogen burning c. neutron capture d. CNO cycle 4. What is the reason why the abundance of elements generally decreases when its atomic number increases? a. They have to have an even number for its mass number. b. New elements are formed from pre-existing precursors. c. It is still unknown. d. They spontaneously decay. 5. Which of the following options below is the main process by which elements up to iron are formed? a. alpha decay b. neutron capture c. nuclear burning d. hydrogen burning
Transcribed Image Text:1. Atomic weights of elements are computed from the weighted average of the abundances of its isotopes. In radioactive elements, why is there a problem with quantitating their atomic weights? (Choose all that apply.) more than one answer can be chosen a. Radioactive elements have varying isotope abundances through time. b. Radioactive elements tend to decay so will have varying weights at any one point. c. Radioactive elements are only found in the stars and so are inaccessible to us. d. Radioactive elements are incorporated in the universal entropy making them difficult to study. 2. How is nuclear stability related to the abundance of elements? a. Nuclear bombardment tend to destroy nuclear stability b. A more stable nucleus will not decay easily, and so will tend to be more abundant. c. An element may have a lot of precursors contributing to its abundance. d. Supernova explosions destabilize elements. 3. Which of the following options below is the main process by which elements heavier than iron are built up? a. nuclear fusion b. hydrogen burning c. neutron capture d. CNO cycle 4. What is the reason why the abundance of elements generally decreases when its atomic number increases? a. They have to have an even number for its mass number. b. New elements are formed from pre-existing precursors. c. It is still unknown. d. They spontaneously decay. 5. Which of the following options below is the main process by which elements up to iron are formed? a. alpha decay b. neutron capture c. nuclear burning d. hydrogen burning
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