Tungsten is a metal that looks like silver but is much harder than typical coin metals. It has a steel-gray appearance, is extremely dense, and ranks very high on the Mohs hardness scale. It's often used in industrial tools and some jewelry for its toughness and scratch resistance.
silver
The US has Never made a silver one cent coin, it may have been plated or just looks like silver but it's not silver. The coin has no collectible value at all.
yes, dental silver is mixed with something to make it harder.
Metal value depends on the purity of the silver and the weight of the coin. Numismatic value depends on the condition of the coin.
The coin is 90% silver & 10% copper.
Proof coins can be struck in any metal. If the coin is made from silver or any other precious metal, it will say so on the packaging it came in and, it will probably state the purity and weight on the coin. Alternatively, if the coin is made from a base metal, it may be silver plated. This should also be stated on the packaging.
It looks like the coin in the related link:
it looks like a silver coin with 100 on it
Silver is a not magnetic metal - the most highly magnetic metal is iron - so no unless the cores of the coins are iron
The value of a silver coin is always changing because the value of silver is always changing. See the related link below for a silver coin value calculator. This does not give the actual value of the coin but it does give the value of the metal used to make the coin. This is know as the melt value.
No British general circulation coin will contain any precious metal. If the coin is silver or any other precious metal, it will say so on the packaging the coin came in and on the Certificate of Authenticity that possibly came with the coin when it was purchased.
If a copper coin is stored in silver nitrate, a chemical reaction will occur where the copper will react with the silver nitrate to form copper nitrate and silver metal. This reaction results in the silver coating the copper coin, giving it a silver appearance due to the deposition of silver metal on its surface.