The general concept of a chemical reaction has been extended to reactions between entities smaller than atoms, including nuclear reactions, radioactive decays, and reactions between elementary particles as described by quantum field theory.n a synthesis reaction, two or more simple substances combine to form a more complex substance. These reactions are in the general form: Two or more reactants yielding one product is another way to identify a synthesis reaction.
For payments paid to unemployed people, see unemployment benefits. The unemployment rate is a measure of the prevalence of unemployment and it is calculated as a percentage by dividing the number of unemployed individuals by all individuals currently in the labor force. During periods of recession, an economy usually experiences a relatively high unemployment rate.
History of U.S. Unemployment. The U.S. government began tracking unemployment officially in the 1950s, but estimates of previous unemployment rates are not difficult to ascertain. The Great Depression of the early 1930s had an unemployment rate of 23.6 percent â the highest in modern times. The countryâs lowest rate â 1.2 percent â came in 1944 when millions of men were in uniform and the wartime (World War II) economy was in overdrive. The lowest post-war rate was 2.9 percent in 1953. Since 1948, the end of the postwar period, the United States has experienced 11 recessions. Over that span, the federal government has employed various methods to push back unemployment caused by these cyclical contractions of the economy.