Final

METALS AND

METALLURGY

*introduction

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.

* GUIDE CARD

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

Science and technology of extracting metals fromtheir ores and of compounding alloys.

Most metals are found in nature in solid inorganiccompounds (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 generallydifficult to treat (not economically viable)

METALLURGY

*What is involved?*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

*Activity 1

Type Minerals

Uncombined Metals ________________________

_____________________ BaCo3, CaCo3, PbCo3

Halides ________________________

Oxides ________________________

Phosphates Ca3(PO4)2, _______________

Silicates ________________________

______________________ Ag2S, CdS, ZnS

Complete the table. (1 pt. each)

*Physical Properties of Metals

*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.

* Physical Properties ofTransition Metals

*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.

* Electron Configurations and Oxidation States

*In paramagnetic atoms and ions, there are unpaired spins.

*The magnetic fields are randomly arranged, though, unless placed in an external magnetic field.

*Activity 2

Physical Properties of Metals

Physical Properties of Transition Metals

Complete the table. (2 pts. each)

*ASSESSMENT CARDI. Enumeration. 5pts

1. What is involved in Metallurgy?2. What are the physical properties of Metals

and Transition Metals?

II. Differentiation 5pts3. Differentiate Metal and Metallurgy.4. Differentiate Metals and Transition Metals.

*ENRICHMENT CARDEncircle 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. mining4. All of the following are the physical properties of metal except?

a. Conduct heat and electricityb. 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. dryingc. alloying d. purifying

*REFERENCE CARD

www.google.com/Metallurgy%20Question%20Bank%20Quize%20Metals%202.html

Google.com

Key Answers – Activity 1

*Activity 2

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)

*Key answerAssessment 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 properties2. 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