英语词汇“transition element”的英英意思、用法、释义、翻译、读音、例句、短语、词组-英语词典

transition element n. Chemistry [after Russian perexodnyj èlement (see transitional element n. at transitional adj. and n. Compounds)] (originally, now historical) any of the nine metallic elements forming group VIII of Mendeleev's periodic table; (now) any of a large class of metallic elements occupying the central block of the periodic table (groups IV b–VIII, I b, and II b, or 4–12, the d-block), which are characterized by partly filled d orbitals, commonly show variable valency and an ability to form coordination compounds, and form many coloured compounds; often extended to include also those elements having partly filled f orbitals (the lanthanides and actinides).Mendeleev's nine original transition elements were iron, cobalt, nickel, ruthenium, rhodium, palladium, osmium, iridium, and platinum, all still considered typical transition elements. Cf. transitional element n. at transitional adj. and n. Compounds.

ΘΚΠ

the world > matter > chemistry > elements and compounds > metals > specific elements > transition element > [noun] > group VIII

transitional element1884

transition element1892

the world > matter > chemistry > elements and compounds > metals > specific elements > transition element > [noun] > groups IIIA-VIIA, VIII and IB

transition element1892

transition metal1929

1892 L. Dobbin & J. Walker Chem. Theory for Beginners xxi. 227/9 (table) Transition Elements.

1922 T. M. Lowry Inorg. Chem. xxxi. 533 A far more satisfactory method of discrimination therefore is to group into families the analogous elements which are found at the beginning of each period,..e.g., the metals of the alkalies and of the alkaline earths, and the analogous elements at the end of each period, e.g., the halogens, and to consider the elements occupying the centres of the long periods separately as transition-elements..linking together the earlier and later elements of the period.

1931 Jrnl. Iron & Steel Inst. 124 615 With the exception of aluminium, all metals present in nitriding steels are transition elements.

1962 F. A. Cotton & G. Wilkinson Adv. Inorg. Chem. xxiv. 494 The large number of transition elements is subdivided into three main groups: (a) the main transition elements or d-block elements, (b) the lanthanide elements, and (c) the actinide elements.

2001 O. Sacks Uncle Tungsten viii. 81 What was it about the transition elements..that gave them their characteristic colors?

2011 H. S. Stoker Gen., Org., & Biol. Chem. (ed. 6) iii. 77 The most abundant transition element in the human body is iron.

单词	transition element
释义	> as lemmas transition element transition element n. Chemistry [after Russian perexodnyj èlement (see transitional element n. at transitional adj. and n. Compounds)] (originally, now historical) any of the nine metallic elements forming group VIII of Mendeleev's periodic table; (now) any of a large class of metallic elements occupying the central block of the periodic table (groups IV b–VIII, I b, and II b, or 4–12, the d-block), which are characterized by partly filled d orbitals, commonly show variable valency and an ability to form coordination compounds, and form many coloured compounds; often extended to include also those elements having partly filled f orbitals (the lanthanides and actinides).Mendeleev's nine original transition elements were iron, cobalt, nickel, ruthenium, rhodium, palladium, osmium, iridium, and platinum, all still considered typical transition elements. Cf. transitional element n. at transitional adj. and n. Compounds. ΘΚΠ the world > matter > chemistry > elements and compounds > metals > specific elements > transition element > [noun] > group VIII transitional element1884 transition element1892 the world > matter > chemistry > elements and compounds > metals > specific elements > transition element > [noun] > groups IIIA-VIIA, VIII and IB transition element1892 transition metal1929 1892 L. Dobbin & J. Walker Chem. Theory for Beginners xxi. 227/9 (table) Transition Elements. 1922 T. M. Lowry Inorg. Chem. xxxi. 533 A far more satisfactory method of discrimination therefore is to group into families the analogous elements which are found at the beginning of each period,..e.g., the metals of the alkalies and of the alkaline earths, and the analogous elements at the end of each period, e.g., the halogens, and to consider the elements occupying the centres of the long periods separately as transition-elements..linking together the earlier and later elements of the period. 1931 Jrnl. Iron & Steel Inst. 124 615 With the exception of aluminium, all metals present in nitriding steels are transition elements. 1962 F. A. Cotton & G. Wilkinson Adv. Inorg. Chem. xxiv. 494 The large number of transition elements is subdivided into three main groups: (a) the main transition elements or d-block elements, (b) the lanthanide elements, and (c) the actinide elements. 2001 O. Sacks Uncle Tungsten viii. 81 What was it about the transition elements..that gave them their characteristic colors? 2011 H. S. Stoker Gen., Org., & Biol. Chem. (ed. 6) iii. 77 The most abundant transition element in the human body is iron. extracted from transitionn. < as lemmas
随便看	cone cone and key cone drawing companionly companionment companionry companions companionship companionships companionway companionways company company account company boat company car company china company commander company controller company director company doctor company dress company drill company employee company executive company face

> as lemmas