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tetratomic
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tetratomic
tetratomic, a. Chem. (tɛtrəˈtɒmɪk) [f. tetra- + atomic.] Containing four atoms in the molecule. † b. = tetravalent, quadrivalent. Obs. † c. = tetrahydric. Obs.1862 Miller Elem. Chem. (ed. 2) III. 52 Tetratomic, or Tetrabasic elements, each atom of which in combination is equivalent to H4, or four at...
Oxford English Dictionary
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Homonuclear molecule
Homonuclear tetratomic molecules include arsenic (As4) and phosphorus (P4).
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tungstous
tungstous, a. Chem. (ˈtʌŋstəs) [f. tungsten + -ous c.] Applied to compounds in which tungsten combines as a tetrad, as tungstous chloride, WCl4, tungstous oxide, WO2. (Cf. tungstic.)1860 in Mayne Expos. Lex. 1868 Watts Dict. Chem. V. 898 Tungsten forms two classes of compounds, in one of which it is...
Oxford English Dictionary
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Transition metal dinitrogen complex
co-workers have shown that the Lewis structures of end-on bridging complexes can be assigned based on π-molecular-orbital occupancy, in analogy with simple tetratomic
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tetradic
tetradic, a. (tɪˈtrædɪk) [f. tetrad + -ic. Cf. F. tétradique (in Cotgr.).] a. Of, pertaining to, or of the nature of a tetrad.1788 T. Taylor Proclus (1792) I. 179 The tetradic ternary, and the triadic quaternary. a 1914 C. S. Peirce Coll. Papers (1935) VI. 222 A tetradic, pentadic, etc. relationship...
Oxford English Dictionary
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triatomic
triatomic, a. Chem. (traɪəˈtɒmɪk) [f. tri- + atom n. + -ic.] a. Having three atoms in the molecule. † b. = trivalent. Obs. c. Containing three hydroxyl groups (OH); = trihydric a.11862 Miller Elem. Chem. (ed. 2) III. 53 To the triatomic group [of elements] belong nitrogen, phosphorus, arsenic, antim...
Oxford English Dictionary
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Interhalogen
Tetratomic interhalogens
Chlorine trifluoride (ClF3) is a colourless gas that condenses to a green liquid, and freezes to a white solid.
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crotonic
crotonic, a. Chem. (krəʊˈtɒnɪk) [f. Croton + -ic.] Of or derived from croton oil; as in crotonic acid, C4H6O2, the second member of the acrylic series. So ˈcrotonate, a salt of crotonic acid. ˈcrotonol, a brown oil obtained from croton oil. ˈcrotonyl, the radical C4H7 of crotonic acid. ˈcrotonyˌlene...
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Three-center four-electron bond
The 3-center 4-electron (3c–4e) bond is a model used to explain bonding in certain hypervalent molecules such as tetratomic and hexatomic interhalogen
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tetrad
tetrad (ˈtɛtrəd) [ad. Gr. τετράς (τετραδ-) a group of four, the number four.] 1. A sum, group, or set of four; four (things, etc.) regarded as a single object of thought.1653 H. More Conject. Cabbal. (1713) 82 It was a solemn Oath..to swear by him that delivered to them the mystery of the Tetractys,...
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Georg-Maria Schwab
At the time, it was still not certain whether the tetratomic species oxozone, , was also present in ozone samples.
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phycite
phycite Chem. (ˈfaɪsaɪt) [f. as prec. + -ite1 4.] A sweet-tasting crystalline substance (C4H10O4) extracted from Protococcus vulgaris; also called erythromannite. Hence in extended sense (see quot. 1866–8).1864–8 Watts Dict. Chem. II. 504 The substance from Protococcus vulgaris was originally called...
Oxford English Dictionary
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quadrivalent
quadrivalent, a. and n. (see below) [f. quadri- + L. valēnt-em, pres. pple. of valēre to be worth.] A. adj. 1. Chem. (kwɒdrɪˈveɪlənt). Having a valency of four; capable of combining with four univalent atoms.1865 A. W. Hofmann in Chem. News 13 Oct. 176/1 The nitrogen and carbon atoms, respectively t...
Oxford English Dictionary
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platinic
platinic, a. Chem. (pləˈtɪnɪk) [f. platin-um + -ic. So F. platinique.] Applied to those compounds of platinum in which it exists in its higher degree of valency, i.e. as a tetrad; as platinic oxide, PtO2; platinic chloride, PtCl4. Opposed to platinous. (Cf. ferric, and see -ic 1 b.)1842 Parnell Chem...
Oxford English Dictionary
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polyatomic
polyatomic, a. Chem. (pɒlɪəˈtɒmɪk) [f. poly- + atomic. So F. polyatomique.] Containing or consisting of many atoms of some substance; esp. having many replaceable hydrogen atoms; also = multivalent. See diatomic, triatomic, tetratomic, hexatomic. In mod. use, (composed of molecules) containing many ...
Oxford English Dictionary
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