Final

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Final

  1. 1. * This Strategic Intervention Material is entitled “Metals and Metallurgy”. It aims to enhance learner’s understanding on the Metals and Metallurgy. The Material has two activities. One on Metals and one in Metallurgy that the students can complete independently, in pairs or small groups. A completing the table type of test were given to assess the learners and to practice them in the test-taking techniques.
  2. 2. Hi I’m Metalino. I am welcoming you to world of fun in Chemistry. We will be taking the Metals and Metallurgy. So fasten your seatbelt as we go and learn. This strategic intervention material is designed to give you a wide understanding on the different concepts related to Metals and Metallurgy. Upon finishing this SIM you are expected to: •Define Metals and Metallurgy •Identify and understand the key concepts Metals and Metallurgy •Differentiate Metals and Metallurgy
  3. 3.  Science and technology of extracting metals from their ores and of compounding alloys. Most metals are found in nature in solid inorganic compounds (minerals) except Au and PGM’s (Pt, Pd, Rh, Ru, Ir, Os) NB source of minerals → oxides, sulphides and carbonates Silicates are abundant, BUT they are generally difficult to treat (not economically viable)
  4. 4. **Mining (then crushing and grinding) *Concentrating the ore → remove the gangue *e.g. magnetic separation, flotation, amalgamation *Reducing the concentrate to obtain free metal *Refining/purifying the metal *Alloying→ mixing metal with other elements to modify properties
  5. 5. * Type Minerals Uncombined Metals ________________________ _____________________ BaCo3, CaCo3, PbCo3 Halides ________________________ Oxides ________________________ Phosphates Ca3(PO4)2, _______________ Silicates ________________________ ______________________ Ag2S, CdS, ZnS Complete the table. (1 pt. each)
  6. 6. * *Conduct heat and electricity. *Malleable (can be pressed or hammered into sheets). *Ductile (can be drawn into wire). *Atoms can slip past each other. * So metals aren’t as brittle as other solids.
  7. 7. * *Some of their properties (such as ionization energy, atomic radius, etc.) are suggestive of isolated atoms. *Others (such as density, melting point, etc.) suggest bulk solid metal.
  8. 8. * *In paramagnetic atoms and ions, there are unpaired spins. *The magnetic fields are randomly arranged, though, unless placed in an external magnetic field.
  9. 9. * Physical Properties of Metals Physical Properties of Transition Metals Complete the table. (2 pts. each)
  10. 10. * I. Enumeration. 5pts 1. What is involved in Metallurgy? 2. What are the physical properties of Metals and Transition Metals? II. Differentiation 5pts 1. Differentiate Metal and Metallurgy. 2. Differentiate Metals and Transition Metals.
  11. 11. * Encircle the correct answer. 1. What do you call the science and technology of extracting metals from their ores and of compounding alloys. a. metal b. mining c. alloying d. metallurgy 2. These are the examples of concentrating the ore except one. a. magnetic b. separation c. filtration d. flotation 3. It is the mixing of metal with other elements to modify properties. a. alloying b. purifying c. refining d. mining 4. All of the following are the physical properties of metal except? a. Conduct heat and electricity b. Malleable (can be pressed or hammered into sheets). c. Ductile (can be drawn into wire). d. Smooth 5. Which of the following is not involved in metallurgy? a. mining b. drying c. alloying d. purifying
  12. 12. * www.google.com/Metallurgy%20Question%20B ank%20Quize%20Metals%202.html Google.com
  13. 13. Key Answers – Activity 1
  14. 14. * Physical Properties of Metals Physical Properties of Transition Metals Conduct heat and electricity. Some of their properties (such as ionization energy, atomic radius, etc.) are suggestive of isolated atoms. Malleable (can be pressed or hammered into sheets). Others (such as density, melting point, etc.) suggest bulk solid metal. Ductile (can be drawn into wire). Atoms can slip past each other. So metals aren’t as brittle as other solids. Complete the table. (2 pts. each)
  15. 15. * Assessment Card I. 1. * Concentrating the ore → remove the gangue * e.g. magnetic separation, flotation, amalgamation * Reducing the concentrate to obtain free metal * Refining/purifying the metal * Mining (then crushing and grinding) * Alloying→ mixing metal with other elements to modify properties 2. Physical properties of metal - Conduct heat and electricity. Malleable (can be pressed or hammered into sheets). Ductile (can be drawn into wire). Atoms can slip past each other. physical properties of transition metal - Some of their properties (such as ionization energy, atomic radius, etc.) are suggestive of isolated atoms, Others (such as density, melting point, etc.) suggest bulk solid metal Enrichment Card 1. D 4. D 2. B 5. B 3. A

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