A semi-detailed lesson plan

A Semi-Detailed Lesson Plan in Chemistry I. TOPIC: Metals and Non-Metals II. OBJECTIVE: At the end of 45 minutes discussion, the students will be able to: 

classify elements as metals or non-metals based on their properties.

III. A. REFERENCES: Chemistry III by Estrella E. Mendoza and Teresita F. Religioso The World of Chemistry 3 by Fely L. Araneta and Leticia V. Catris http://hyperphysics.phy-astr.gsu.edu/hbase/pertab/metal.html

B. Materials: Visual Aids Picture Marker Cartolina

IV.

Procedure Learning Activities

PRESENTATION If you look around your house you will see hundreds of objects made from dozens of kinds of materials. Have you ever wondered why manufacturer chose the materials they did for each item? Why are frying pans made of metal and their handle is made of a special kind of plastic? Could a cup be made of metal? Could a frying pan be made of paper or plastic?

For your activity. The students will form a group. One member will be the leader, secretary and reporter. Each group will be given a picture. They have to group the materials in the picture as metal or non metal basing on its properties. A member of the group will then present there answers to the class.

LESSON PROPER: Elements are grouped into three groups in the periodic table. These groups are the metals, non-metals and the metalloids. Each of these groups differs in their properties. The list of properties for metals and non-metals were summarized in the table below. Metalloids on the other hand, have the properties of both metals and non-metals. But for this discussion, we will just focus on the properties of both metals and non-metals. Properties Metals

Nonmetals

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Hard, dense, solid (except mercury)

Shiny and can be polished

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Malleable and ductile

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Some are gases, liquids, or solids; less dense and softer (except diamond)

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Dull, cannot be polished (except diamond)

Strong (can hold heavy loads without breaking)

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Sonorous (ringing sound can be heard  when struck)  Can conduct heat and electricity.  Usually have high melting points  Have high densities

Brittle Not sonorous Insulators (except graphite) Have low melting points Have low densities

Metals and Non-Metals Properties of Metals: Luster: Metals, in their pure state, have a shining surface. This property is called metallic luster. Malleability: Some metals can be beaten into thin sheets. This property is called malleability. Gold and silver are the most malleable metals. Ductility: The ability of metals to be drawn into thin wires is called ductility. Gold is the most ductile metal. A wire of about 2 km length can be drawn from one gram of gold. Conductivity: Metals are good conductors of heat and have high melting points. The best conductors of heat are silver and copper. Lead and mercury are comparatively poor conductors of heat. Metals are good conductors of electricity as well. Ability to Produce Sound: The metals that produce a sound on striking a hard surface are said to be sonorous.

IV.

EVALUATION:

Identify the following elements as metals or non-metals based on the descriptions given below. __________________1. Gold jewelries are shiny. __________________2. Chalk is breaks easily. __________________3. Jena accidentally broke the vase of red roses. __________________4. Copper is used in electrical wiring at home. __________________5. Henry bought 10 galvanized iron for their roof. V.

ASSIGNMENT: List 5 metals and non-metals found at home and relate its property to its uses.