METALS NONMETALS AND ALLOYS EXAMPLES OF METAL PHYSICAL

PHYSICAL PROPERTIES OF METALS Have Luster -shiny Are Conductors -heat and electricity move through

PHYSICAL PROPERTIES OF NONMETALS Dull – not shiny Nonconductors – heat and electricity do

THE COMPOSITION, PROPERTIES AND USES OF ALLOYS. Alloy Composition Properties Uses Steel 99% iron

Alloy Composition Properties Uses Bronze 90% copper 10% tin Hard, strong, shiny -Kitchenware, ships’

Alloy Composition Properties Uses solder 50% tin 50% lead Hard, shiny and with low

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METALS , NON-METALS AND ALLOYS

EXAMPLES OF METAL

PHYSICAL PROPERTIES OF METALS Have Luster -shiny Are Conductors -heat and electricity move through them easily Malleable – Can be hammered into a different shape Ductile – Can be drawn into a wire High Density – Heavy for their size Metals are solid, except for mercury

EXAMPLES OF NONMETALS

PHYSICAL PROPERTIES OF NONMETALS Dull – not shiny Nonconductors – heat and electricity do not move through easily Brittle – break easily Most nonmetals are gases at room temperature

THE COMPOSITION, PROPERTIES AND USES OF ALLOYS. Alloy Composition Properties Uses Steel 99% iron 1% carbon High strength -Car bodies, bridges and ships. Carbon steel 99% iron, 1% carbon Hard and strong -construction of buildings and bridges, making of tools, framework of heavy machinery and body of vehicles. Stainless steel 80. 6% iron 0. 4% carbon 18% chromium 1% nickel Shiny, strong and resists rusting -Cutlery, kitchenware, machine parts and surgical instruments.

Alloy Composition Properties Uses Bronze 90% copper 10% tin Hard, strong, shiny -Kitchenware, ships’ and resistance to propellers, decorative corrosion. ornaments, statues and art crafts. Brass 70% copper 30% zinc Hard, shiny and resistance to corrosion. -electrical connectors, musical instruments, kitchenware and decorative ornaments Magnalium 70% aluminium 30% magnesium Light, hard and strong -aircraft body frames and rims of racing car tyres. Duralumin 95% aluminium 3% copper 1% magnesium 1% manganese Low density, high strength, and resistance to corrosion. -Aircraft, electric cable

Alloy Composition Properties Uses solder 50% tin 50% lead Hard, shiny and with low melting point -Solder for electrical wires and metal pipes. Cupro-nickel Copper, nickel (percentage according to colour) Hard, shiny and resists corrosion. -Making coins of 10 sen, 20 sen and 50 sen Pewter 91% tin 7% antimony 2% copper High strength, resistance to corrosion and bright shiny surface -ornament, souvenirs