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In chemistry, a radical, also known as a free radical, is an atom, molecule, or ion that has at least one unpaired valence electron. [1] [2] With some exceptions, these unpaired electrons make radicals highly chemically reactive. Many radicals spontaneously dimerize. Most organic radicals have short lifetimes.
Radical expression involving roots, also known as an nth root; Radical symbol (√), used to indicate the square root and other roots; Radical of an algebraic group, a concept in algebraic group theory; Radical of an ideal, an important concept in abstract algebra; Radical of a ring, an ideal of "bad" elements of a ring
The French Radical Party (1937–1938) was a similar small anti-communist splinter, led by André Grisoni. These two small groups merged in 1938 as the short-lived Independent Radical Party, which was itself restored after the Second World War and was a founding organisation of the Alliance of Left Republicans.
Radical Republicans sought to guarantee civil rights for African Americans, ensure that the former Confederate states had limited power in the federal government, and promote free market capitalism in the South in place of a slave based economy. Many Radical Republicans were also supportive of Labor Unions, though this element would fade over time.
The hydroxyl radical, • HO, is the neutral form of the hydroxide ion (HO –). Hydroxyl radicals are highly reactive and consequently short-lived; however, they form an important part of radical chemistry .
Radical politics denotes the intent to transform or replace the fundamental principles of a society or political system, often through social change, ...
The radical symbol refers to the principal value of the square root function called the principal square root, which is the positive one. The two square roots of a negative number are both imaginary numbers , and the square root symbol refers to the principal square root, the one with a positive imaginary part.
The Radicals were opposed by former slaveowners and white supremacists in the rebel states. Radicals were targeted by the Ku Klux Klan, who shot to death one Radical Congressman from Arkansas, James M. Hinds. "Grant's Last Outrage in Louisiana" art in Frank Leslie's Illustrated Newspaper of January 23, 1875