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They are not called alloys, these 5 metals are elements. An alloy is a metal which consists chemically of 2 or more different metals.

Gold, silver, copper, zinc, and nickel are often alloyed with other metals to improve upon the physical characteristics of the pure metal. Pure gold, for example, is soft and will be damaged quickly when used as coinage. It is much more durable when it is alloyed with silver. All metals used in manufacturing coins are alloys, but are referred to by the name of the main element in the alloy.

on there own they're too soft for many uses so they are mixed together to make them harder
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14y ago
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13y ago

they are alloys because they are metals made up of mixtures of other substances, not pure elements like iron. Steel is made up of mainly iron and carbon; bronze is made up of mainly copper, and usually a bit of tin but often other elements like phosphorus.

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13y ago

The British One Pound coin is made from 70% copper, 24.5% zinc and 5.5% nickel.

As far as coins go, the One Pound coin is a relatively high value general circulation coin and the alloy of these metals in these percentages make a gold coloured hard wearing, durable coin that is resistant to corrosion and is cheap to make.

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9y ago

To get the properties we want for specific applications.

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8y ago

These metals (especially platinum and gold) are less chemically reactive.

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Q: Why is gold platinum and silver are called noble metals?
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Related questions

Why are gold silver and platinum are called noble metals?

These metals (especially platinum and gold) are less chemically reactive.


What are noble metal?

Noble metals are called platinic metals (platinum, palladium, rhodium, osmium, iridium, ruthenium) and also gold and silver.


Is titanium a noble metal?

no


What are 5 noble metals?

8 noble metals are: gold silver palladium iridium platinum rhodium ruthenium osmium some add: rhenium


Why gold and platinum are called noble metals?

Because they don't react with other elements.


What do 'noble metals' and 'noble gases' mean?

Noble metals: platinum, iridium, rhodium, palladium, osmium, ruthenium, silver, goldNoble gases: helium, neon, argon, krypton, xenon, radonNoble in this case has the significance of with low chemical reactivity.


What metal corrodes the slowest in salt water?

The noble metals such as gold, silver, or platinum (etc.) do not readily corrode in salt water


What does the term noble mean when referring to noble metals and noble gasses?

They generally do not react with other elements. In other words, they're "too good" to associate with anything else. When discussing metals, it also means that they don't corrode (i.e. they don't oxidize). Noble metals such as gold and platinum are considered more valuable than metals such as silver, which slowly tarnishes.


What is a sentence for the word noble?

My first car was a Noble. Gold and silver are noble metals.


What do you mean by noble metals?

The noble metals are a group of metals that resist oxidation and corrosion in moist air. They are the opposite of the base metals, which more readily oxidize and corrode. Some of the noble metals are gold, platinum, and iridium. Aside from being corrosion resistant, they are also very expensive.


What are the different types of family of elements?

Examples: alkali metals, alkali earth metals, noble gases, platinum metals, halogens, etc.


Why is gold called a noble metal?

Gold is a very unreactive metal and is found in its native state in the ground, platinum and silver also behave this way. Other metals that are not of this nature are found mixed in with rocks and these are called ores.