tetravalentadj.

/tɪˈtravələnt/

/tɛtrəˈveɪlənt/

Etymology: < Greek τετρα- tetra- comb. form + Latin valēnt-em, present participle of valēre to be worth.With tetravalence compare French tetravalence (1879).

Chemistry.

Combining with four atoms of hydrogen or other monovalent element, or with four monovalent radicals, or capable of replacing four atoms of monovalent elements in a compound; thus the atoms of carbon and of lead are tetravalent in the compounds CH₄, Pb(C₂H₅)₄; = quadrivalent adj. 1.

ΘΚΠ

the world > matter > chemistry > valency > [adjective] > having a valency of four

tetratomic1862

quadrivalent1865

tetradic1868

tetravalent1868

1868 A. W. Williamson Chem. for Students 124 Oxygen is..called a divalent element. A similar reasoning shows nitrogen to be trivalent; and carbon is tetravalent.

1887 Athenæum 13 Aug. 217/1 Proof is thus afforded that these elements [sulphur and selenium] are at least tetravalent in function.

1976 Sci. Amer. Dec. 33/1 In the solvents that were used..tetravalent plutonium ions, Pu⁴⁺ (plutonium atoms from which four electrons have been removed), are soluble.

Derivatives

tetravalence n. the quality or fact of being tetravalent; quadrivalence.

ΘΚΠ

the world > matter > chemistry > valency > [noun] > valency of four > quality of being quadrivalent

quadrivalence1869

tetravalence1887

tetravalency1913

1887 Trans. Royal Soc. Edinb. 32 456 The tetravalence of Carbon unsatiated by the bivalence of Oxygen.

tetraˈvalency n.

ΘΚΠ

the world > matter > chemistry > valency > [noun] > valency of four > quality of being quadrivalent

quadrivalence1869

tetravalence1887

tetravalency1913

1913 London, Edinb., & Dublin Philos. Mag. 6th Ser. 26 495 The observed trivalency and tetravalency respectively of these elements.

1982 Nature 25 Nov. 386/1 Organic chemistry, thanks to the tetravalency of carbon and the stability of its incestuous bonds, is responsible for most of the compounds.

This entry has not yet been fully updated (first published 1911; most recently modified version published online December 2018).

单词	tetravalent
释义	tetravalentadj. /tɪˈtravələnt//tɛtrəˈveɪlənt/ Etymology: < Greek τετρα- tetra- comb. form + Latin valēnt-em, present participle of valēre to be worth.With tetravalence compare French tetravalence (1879). Chemistry. Combining with four atoms of hydrogen or other monovalent element, or with four monovalent radicals, or capable of replacing four atoms of monovalent elements in a compound; thus the atoms of carbon and of lead are tetravalent in the compounds CH₄, Pb(C₂H₅)₄; = quadrivalent adj. 1. ΘΚΠ the world > matter > chemistry > valency > [adjective] > having a valency of four tetratomic1862 quadrivalent1865 tetradic1868 tetravalent1868 1868 A. W. Williamson Chem. for Students 124 Oxygen is..called a divalent element. A similar reasoning shows nitrogen to be trivalent; and carbon is tetravalent. 1887 Athenæum 13 Aug. 217/1 Proof is thus afforded that these elements [sulphur and selenium] are at least tetravalent in function. 1976 Sci. Amer. Dec. 33/1 In the solvents that were used..tetravalent plutonium ions, Pu⁴⁺ (plutonium atoms from which four electrons have been removed), are soluble. Derivatives tetravalence n. the quality or fact of being tetravalent; quadrivalence. ΘΚΠ the world > matter > chemistry > valency > [noun] > valency of four > quality of being quadrivalent quadrivalence1869 tetravalence1887 tetravalency1913 1887 Trans. Royal Soc. Edinb. 32 456 The tetravalence of Carbon unsatiated by the bivalence of Oxygen. tetraˈvalency n. ΘΚΠ the world > matter > chemistry > valency > [noun] > valency of four > quality of being quadrivalent quadrivalence1869 tetravalence1887 tetravalency1913 1913 London, Edinb., & Dublin Philos. Mag. 6th Ser. 26 495 The observed trivalency and tetravalency respectively of these elements. 1982 Nature 25 Nov. 386/1 Organic chemistry, thanks to the tetravalency of carbon and the stability of its incestuous bonds, is responsible for most of the compounds. This entry has not yet been fully updated (first published 1911; most recently modified version published online December 2018). < adj.1868
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