Silver is alloyed with copper to be more hard.
Sterling silver
All circulating US silver coins were at least 10% copper. Pure silver is far too soft, so it has to be alloyed to stand up to circulation wear.
It's not pure silver. Pure silver is too soft for use in coins so it's alloyed with 10% copper. Please see the related question for more.
Pure silver has a bright, metallic luster and is a shiny, white metal. However, it is soft and prone to scratches, so it is often alloyed with other metals for jewelry and other applications.
There is no naturally occurring yellow silver. Pure silver is a white metallic element, but it can be alloyed with other metals like copper to create shades of yellow.
Half cents and Large cents were pure copper. Higher denomination coins were silver alloyed with copper, or gold alloyed with copper.
24k gold is pure gold but is too soft to be used for much. So it is usually alloyed with copper and silver to make it harder.
Some percentage of alloyed is mixed with silver to make sterling silver jewelry. What is the name of this alloyed ?
All US silver one dollar coins from 1840 to 1935 contain 0.77344 troy oz of pure silver, alloyed with 10% copper for hardness.
Pure silver is a single substance, an element. All its particles are silver atoms. That said, it is rare to encounter pure silver. For coinage and jewellery it is usually alloyed, often with copper, to make it harder.
Silver ingots, as we normally see them, are usually essentially Pure Silver (element) with a very small percent of impurities alloyed (mixture.)
Silver