Why is 9 carat gold often used instead of pure gold?

A bar of impure 9-carat gold is often used instead of pure gold to make jewelry because it is stronger but still shiny or lustrous.

What is an alloy GCSE?

An alloy is a mixture of two or more elements , where at least one element is a metal .

Where do metals come from BBC Bitesize?

Metals come from an ore that is mined from the ground. A huge amount of heat energy is needed to extract the metal from the ore – this energy often comes from fossil fuels . Metal ores are non-renewable , meaning they are a finite resource and therefore recycling metal is important.

What is copper used for BBC Bitesize?

Copper and brass resist corrosion and are good electrical conductors. Copper is a better conductor than brass, and it is used in electrical wiring. Brass is stronger than copper, so it is used for the pins in electrical plugs.

What are the properties and properties of gold?

Properties of Gold. Gold is a soft, yellow metal. Like all other metals, gold is also highly malleable and ductile. Moreover, gold is able to conduct both electricity and heat rather easily. The atomic number of gold is 79, and its elemental abbreviation is Au, from the Latin ‘aurum ‘ meaning ‘shining dawn’.

What makes gold a good conductor of heat and electricity?

1 Being very good conductors of heat and electricity, the metal does not get affected by air and most reagents. 2 The element is corrosion resistant and is present in deposits of alluvium and veins. 3 Most common gold compounds include chloroauric acid and auric chloride. 4 To provide more strength to the metal, another soft metal is alloyed to it.

Why is gold a good metal to make jewellery with?

Gold is very unreactive and relatively easy to shape, therefore good for making jewellery with. In this GCSE Chemistry quiz we take a look at some of the properties of metals, such as malleability and conductivity. We also find out about how the different properties of metals affect their uses.

What are some interesting facts about gold and its atom?

Learn more about this famous metal and its unique atom structure by enjoying our interesting facts about gold. Gold is a chemical element. Its chemical symbol is Au and its atomic number is 79. Compared to other metals, gold is less chemically reactive.