Transition Elements
Akopọ
In the wide central block of the periodic table sit the transition elements, the familiar everyday metals such as iron, copper, nickel and chromium. They are the metals we build with, wire our homes with and shape into tools, and they bring a distinctive set of properties that set them apart from the reactive metals of Groups I and II.
In this lesson you will learn the characteristic properties of the transition elements: their high densities and melting points, their coloured compounds, their use as catalysts, and the way they form ions with more than one charge, such as iron(II) and iron(III).
Awọn Afojusun
- Describe the transition elements as metals that: (a) have high densities (b) have high melting points (c) form coloured compounds (d) often act as catalysts as elements and in compounds.
- [Supplement] Describe transition elements as having ions with variable oxidation numbers, including iron(II) and iron(III).
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Oriire fun ipari ẹkọ lori Transition Elements. Ni bayi ti o ti ṣawari naa awọn imọran bọtini ati awọn imọran, o to akoko lati fi imọ rẹ si idanwo. Ẹka yii nfunni ni ọpọlọpọ awọn adaṣe awọn ibeere ti a ṣe lati fun oye rẹ lokun ati ṣe iranlọwọ fun ọ lati ṣe iwọn oye ohun elo naa.
Iwọ yoo pade adalu awọn iru ibeere, pẹlu awọn ibeere olumulo pupọ, awọn ibeere idahun kukuru, ati awọn ibeere iwe kikọ. Gbogbo ibeere kọọkan ni a ṣe pẹlu iṣaro lati ṣe ayẹwo awọn ẹya oriṣiriṣi ti imọ rẹ ati awọn ogbon ironu pataki.
Lo ise abala yii gege bi anfaani lati mu oye re lori koko-ọrọ naa lagbara ati lati ṣe idanimọ eyikeyi agbegbe ti o le nilo afikun ikẹkọ. Maṣe jẹ ki awọn italaya eyikeyi ti o ba pade da ọ lójú; dipo, wo wọn gẹgẹ bi awọn anfaani fun idagbasoke ati ilọsiwaju.
- Which is a typical property of a transition element? A. Low melting point B. White compounds only C. High density D. Very reactive with water Answer: C
- Transition elements often act as: A. Insulators B. Catalysts C. Non-metals D. Noble gases Answer: B
- Which pair of ions shows the variable oxidation numbers of iron? A. Fe+ and Fe2+ B. Fe2+ and Fe3+ C. Fe3+ and Fe4+ D. Fe and Fe2+ Answer: B
- Compared with Group I metals, transition elements are: A. Softer and more reactive B. Harder and less reactive C. Lighter and more reactive D. Lower melting Answer: B
- Transition metal compounds are usually: A. Colourless B. White C. Coloured D. Gaseous Answer: C
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Ṣiṣẹ́ lórí àwọn ìbéèrè wọ̀nyí nínú ohun èlò náà
Awọn Iwe Itọsọna Ti a Gba Nimọran
Ẹ̀kọ́ síwájú láti àwọn orísun ṣíṣí
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Abala ìwé ẹ̀kọ́
Occurrence, Preparation, and Properties of Transition Metals and Their Compounds
Outline the general approach for the isolation of transition metals from natural sources
"Chemistry: Occurrence, Preparation, and Properties of Transition Metals and Their Compounds" by OpenStax, OpenStax, Rice University, licensed under CC BY 4.0 (https://creativecommons.org/licenses/by/4.0/). Source: https://openstax.org/books/chemistry/pages/19-1-occurrence-preparation-and-properties-of-transition-metals-and-their-compounds. Access for free at https://openstax.org/books/chemistry/pages/1-introduction
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