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1. Superheavy elements can only be discovered through synthesizing them in a laboratory. |
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2. Calcium-48 was used to form elements 113-118 because it is stable and neutron rich. |
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3. When nuclei in the beam combine with target nuclei, protons carry energy away. |
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4. The number of neutrons is unimportant in trying to form a heavy nucleus. |
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5. Californium-249 can only be produced in a laboratory through a series of neutron captures, followed by beta decay. |
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6. Californium-249 has a half-life of more than 350 years. |
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7. Projectile nuclei ions are accelerated in a cyclotron until they have the right energy to be sent toward the target nuclei. |
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8. Approximately 10% of the projectiles produced in the cyclotron produce the desired product. |
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9. The detector calculates the mass of an ion by measuring the time required for an ion of interest to travel between two grids and the distance between the grids. |
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10. As of the writing of this article, all of the elements through element 118 have been discovered or created in a laboratory. |