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Which isotope, when bombarded with oxygen-18, yields the artificial isotope seaborgium-263 plus 4 neutrons
Lewis and Clark Expedition
A journey undertaken by Meriwether Lewis and William Clark from 1804 to 1806, across North America to explore the lands west of the Mississippi River acquired in the Louisiana Purchase.
Louisiana Purchase
The acquisition by the United States of America of over 800,000 square miles of territory from France in 1803, doubling the size of the nation.
Economic Potential
The capacity of a country, region, or sector to generate goods and services and grow its economy, influenced by resources, labor, technology, and innovation.
Native Americans
The indigenous peoples of the United States, including the cultures, tribes, and individuals who inhabited the land prior to European colonization.
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