Chemistry - 0620 CIE

Properties Of Metals

Muhtasari

Metals share a recognisable set of properties: they conduct heat and electricity, can be hammered into shape and drawn into wires, and usually have high melting points. These shared traits, and the chemical reactions metals undergo, explain why metals are so useful and how reactive each one is.

In this lesson you will compare the physical properties of metals and non-metals, then study the general chemical reactions of metals with dilute acids, with cold water and steam, and with oxygen. Together these build a clear picture of how metals behave and why their reactivity differs.

Malengo

  1. Compare the general physical properties of metals and non-metals, including: (a) thermal conductivity (b) electrical conductivity (c) malleability and ductility (d) melting points and boiling points.
  2. Describe the general chemical properties of metals, limited to their reactions with: (a) dilute acids (b) cold water and steam (c) oxygen.

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Maelezo ya Somo

Metals are the materials of the modern world, from the steel in buildings to the copper in cables. Knowing their physical properties tells you what they are good for, and knowing their chemical reactions tells you how reactive they are, which decides how they are stored, used and extracted. These reactions are also the foundation of the reactivity series.

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  1. Which property is typical of a metal but not a non-metal? A. Poor electrical conductivity B. Being brittle C. Being malleable and ductile D. Low melting point Answer: C
  2. When a metal reacts with a dilute acid, the products are: A. A salt and water B. A salt and hydrogen C. A salt and oxygen D. An oxide only Answer: B
  3. Which gas is produced when sodium reacts with cold water? A. Oxygen B. Carbon dioxide C. Hydrogen D. Chlorine Answer: C
  4. A moderately reactive metal such as magnesium reacts with steam to form: A. The metal hydroxide and oxygen B. The metal oxide and hydrogen C. The metal chloride and hydrogen D. The metal only Answer: B
  5. Which metal does NOT react with dilute hydrochloric acid? A. Magnesium B. Zinc C. Iron D. Copper Answer: D

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Vitabu Vinavyopendekezwa

Cambridge IGCSE Chemistry Coursebook
Cambridge IGCSE Chemistry Coursebook
Manukuu: Fifth edition
Mchapishaji: Cambridge University Press
Mwaka: 2021
ISBN: 978-1-108-95160-9
Maelezo: Endorsed coursebook with full coverage of the 0620/0971 syllabus, worked examples and practical guidance.
Cambridge IGCSE Chemistry
Cambridge IGCSE Chemistry
Manukuu: Fourth edition
Mchapishaji: Hodder Education
Mwaka: 2021
ISBN: 978-1-398-31050-6
Maelezo: Endorsed textbook covering the Core and Supplement content with questions and practical work.

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