JHS-2 Syllabus - Metals and non-metals

1.2.1 group the first twenty elements of the periodic table into metals and non-metals.

Properties of metals.
Chemical Properties of metals: Reactivity of metals

- group the first twenty elements on the periodic table into metals and non-metals.

NOTE: Use the position of the elements in the Periodic Table to group them into metals and non- metals.

- drop a small piece of a metal into dilute acid solution/lime juice. state their observations in each case and draw conclusion.

List four physical properties of metals.

1.2.2 explain why non-reactive metals are preferred in making ornaments and jewelry.

Differences between metals and non-metals.

Meaning of alloy:

- discuss why certain metals are used to make jewelry and ornaments.

- discuss the differences between metals and non-metals.

Name three metals that are: reactive, non-reactive

1.2.3 outline the composition of some common alloys and their uses.

- discuss the composition of some common alloys.

Uses of alloys.

Name four alloys and state their composition.

1.2.4 define and outline the effects of corrosion

Effects of rusting.

- perform activities to demonstrate the process of rusting using water, iron nails/steel sponge.

- discuss the effect of rusting on objects.

Explain the effects of corrosion of metals in buildings

Explain how rusting takes place.

1.2.5 describe ways for preventing rusting.

- discuss how surfaces of metals can be protected to prevent rusting.
- mention examples of iron – containing materials used in the home.
- bring some metallic items and use different processes for rust prevention on the items.

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