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.
Number of unemployed persons in the United States from 1990 to 2016 (in millions)U.S. unemployment level 1990-2016. Monthly number of unemployed persons in the U.S. from March 2016 to March 2017 (in millions, adjusted)U.S. unemployment level - seasonally adjusted monthly number March 2017.