Ronald Reagan (Wikipedia)

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Ronald Wilson Reagan (/ˈreɪɡən/ RAY-gən; February 6, 1911 – June 5, 2004) was an American politician and actor who served as the 40th president of the United States from 1981 to 1989. He was a member of the Republican Party; his presidency constituted the Reagan era, and he is considered one of the most prominent conservative figures in American history.

United States (Wikipedia) The United States of America (U.S.A. or USA), commonly known as the United States (U.S. or US) or America, is a country in North America. It consists of 50 states, a federal district, five major unincorporated territories, nine Minor Outlying Islands, and 326 Indian reservations. It is the world’s third-largest country by both land and total area. The United States shares land borders with Canada to its north and with Mexico to its south. It has maritime borders with the Bahamas, Cuba, Russia, and other nations. With a population of over 331 million, it is the most populous country in the Americas and the third most populous in the world. The national capital is Washington, D.C., and the most populous city and financial center is New York City.

Republican Party (United States) (Wikipedia) The Republican Party, also known as the GOP (Grand Old Party), is one of the two major contemporary political parties in the United States. It emerged as the main political rival of the Democratic Party in the mid-1850s.

Plum pudding model (Wikipedia) The now obsolete plum pudding model was the first scientific model of the atom with internal structure. It was first proposed by J. J. Thomson in 1904 following his discovery of the electron in 1897 and subsequently rendered obsolete by Ernest Rutherford’s discovery of the atomic nucleus in 1911. The model tried to account for two properties of atoms then known: that there are electrons and that atoms have no net electric charge. Logically there had to be a commensurate quantity of positive charge to balance out the negative charge of the electrons, but having no clue as to the source of this positive charge, Thomson tentatively proposed it was everywhere in the atom, the atom being in the shape of a sphere for the sake of mathematical simplicity. Following from this, Thomson imagined that the balance of electrostatic forces in the atom would distribute the electrons in a more or less even manner throughout this hypothetical sphere.

George H. W. Bush (Wikipedia) George Herbert Walker Bush (June 12, 1924 – November 30, 2018) was an American politician, diplomat, and businessman who served as the 41st president of the United States from 1989 to 1993. A member of the Republican Party, he also served as the 43rd vice president from 1981 to 1989 under Ronald Reagan, and in various other federal positions prior to that.

Jimmy Carter (Wikipedia) James Earl Carter Jr. (born October 1, 1924) is an American politician and humanitarian who served as the 39th president of the United States from 1977 to 1981. A member of the Democratic Party, Carter was the 76th governor of Georgia from 1971 to 1975, and a Georgia state senator from 1963 to 1967. At age 99, he is both the oldest living former U.S. president and the longest-lived president in U.S. history.