To clear things up:
> The Mercury design was used on dimes from 1916 to 1945.
> All 1900 nickels carried a Liberty Head design on the front and the Roman numeral V (= 5) on the back.
Please check your coin again and post a new question.
4-25-11>> A 1900 Liberty Head Nickel has a value of $3.00-$5.00 for a coin in average condition.
There is no such thing as a Mercury nickel. See the related question below.
About $2.00 if it's grade G-4.
Back in 1903, the nickel was called, the "Liberty" nickel. The name "Mercury" only refers to the dime and came into circulation in 1916. The "Mercury" dime was produced until 1945. In 1946 to present, it is called the "Roosevelt" dime.
A U.S. Liberty head nickel dated 1900 is common. Most have values of $1.00-$3.00.
A very common coin, average value is $2.00-$5.00 for most coins in average circulated grades.
1900 would make it a Barber dime, not a Mercury dime (the Mercury design wasn't introduced until 1916). The value depends on condition and mint. It's worth at least $3.00 for a worn Philadelphia specimen, and over $100 for a better New Orleans.
Yes, nickel can float on liquid mercury because the density of nickel is lower than that of mercury. This means that nickel will not sink when placed on liquid mercury, and instead will float on its surface.
Not Mercury, either. The so-called Mercury design was used on dimes from 1916 to 1945. Please post a new question with a more complete description of the coin. If it has a large V on the back it's a Liberty Nickel.
if the barrel is nickel steel 1900-2500 bucks
made around 1900. Value depends on condition,markings,history,etc.
Remember Roman numerals? V = 5, not 10, so you have a nickel (that's also why it's the size of a nickel). Please see the Related Question for more.