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  2. Valence (chemistry) - Wikipedia

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

    The valence is the combining capacity of an atom of a given element, determined by the number of hydrogen atoms that it combines with. In methane, carbon has a valence of 4; in ammonia, nitrogen has a valence of 3; in water, oxygen has a valence of 2; and in hydrogen chloride, chlorine has a valence of 1.

  3. Monovalence - Wikipedia

    en.wikipedia.org/wiki/Monovalence

    Monovalence or Monovalent may refer to: Monovalent ion, an atom, ion, or chemical group with a valency of one, which thus can form one covalent bond; Monovalent vaccine, a vaccine directed at only one pathogen; Monovalent antibody, an antibody with affinity for one epitope, antigen, or strain of microorganism

  4. Polyvalency (chemistry) - Wikipedia

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

    In carbon tetrachloride (b), C is connected to four Cl atoms and is tetravalent. In chemistry , polyvalency (or polyvalence , multivalency ) is the property of molecules and larger species, such as antibodies , medical drugs, and even nanoparticles surface-functionalized with ligands, like spherical nucleic acids , that exhibit more than one ...

  5. Valence electron - Wikipedia

    en.wikipedia.org/wiki/Valence_electron

    Four covalent bonds.Carbon has four valence electrons and here a valence of four. Each hydrogen atom has one valence electron and is univalent. In chemistry and physics, valence electrons are electrons in the outermost shell of an atom, and that can participate in the formation of a chemical bond if the outermost shell is not closed.

  6. Bent's rule - Wikipedia

    en.wikipedia.org/wiki/Bent's_rule

    Bent's rule can be extended to rationalize the hybridization of nonbonding orbitals as well. On the one hand, a lone pair (an occupied nonbonding orbital) can be thought of as the limiting case of an electropositive substituent, with electron density completely polarized towards the central atom.

  7. Nitrene - Wikipedia

    en.wikipedia.org/wiki/Nitrene

    The nitrogen atom is uncharged and monovalent, [1] so it has only 6 electrons in its valence level—two covalent bonded and four non-bonded electrons. It is therefore considered an electrophile due to the unsatisfied octet. A nitrene is a reactive intermediate and is involved in many chemical reactions.

  8. Univalent - Wikipedia

    en.wikipedia.org/wiki/Univalent

    Univalent function – an injective holomorphic function on an open subset of the complex plane Univalent foundations – a type-based approach to foundation of mathematics Univalent relation – a binary relation R that satisfies x R y and x R z implies y = z . {\displaystyle xRy{\text{ and }}xRz{\text{ implies }}y=z.}

  9. Atom (measure theory) - Wikipedia

    en.wikipedia.org/wiki/Atom_(measure_theory)

    Consider the set X = {1, 2, ..., 9, 10} and let the sigma-algebra be the power set of X. Define the measure of a set to be its cardinality, that is, the number of elements in the set. Then, each of the singletons {i}, for i = 1, 2, ..., 9, 10 is an atom. Consider the Lebesgue measure on the real line. This measure has no atoms.