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  2. Radical - Wikipedia

    en.wikipedia.org/wiki/Radical

    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

  3. Radicalism in the United States - Wikipedia

    en.wikipedia.org/wiki/Radicalism_in_the_United...

    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.

  4. Radical (chemistry) - Wikipedia

    en.wikipedia.org/wiki/Radical_(chemistry)

    The hydroxyl radical, Lewis structure shown, contains one unpaired electron. Lewis dot structure of a Hydroxide ion compared to a hydroxyl radical. In chemistry, a radical, also known as a free radical, is an atom, molecule, or ion that has at least one unpaired valence electron.

  5. Radical symbol - Wikipedia

    en.wikipedia.org/wiki/Radical_symbol

    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.

  6. Root (linguistics) - Wikipedia

    en.wikipedia.org/wiki/Root_(linguistics)

    A root (also known as a root word or radical) is the core of a word that is irreducible into more meaningful elements. [1] In morphology , a root is a morphologically simple unit which can be left bare or to which a prefix or a suffix can attach.

  7. Nested radical - Wikipedia

    en.wikipedia.org/wiki/Nested_radical

    In algebra, a nested radical is a radical expression (one containing a square root sign, cube root sign, etc.) that contains (nests) another radical expression. Examples include Examples include 5 − 2 5 , {\displaystyle {\sqrt {5-2{\sqrt {5}}\ }},}

  8. Radical of an integer - Wikipedia

    en.wikipedia.org/wiki/Radical_of_an_integer

    In number theory, the radical of a positive integer n is defined as the product of the distinct prime numbers dividing n. Each prime factor of n occurs exactly once as a factor of this product: r a d ( n ) = ∏ p ∣ n p prime p {\displaystyle \displaystyle \mathrm {rad} (n)=\prod _{\scriptstyle p\mid n \atop p{\text{ prime}}}p}

  9. Chemical reaction - Wikipedia

    en.wikipedia.org/wiki/Chemical_reaction

    In other words, acids act as proton ... radical substitution, the attacking particle is a radical. [44] This process usually takes the form of a chain reaction, for ...