That's not really enough detail to go on because a lot of nickel-sized coins from various countries have the numeral 5 on them:
U.S. - "shield" nickels made from 1866 to 1883
Germany - 5 pfennig coins made for centuries
England - 5 pence coins made from 1968 to the present
European Union - 5 cent coins made from 2002 to the present
and many more...
Please post a new question with a description of the pictures on the coin.
a nickel
1906 is a common date for Liberty Head nickels, most circulated coins are valued at $1.00-$3.00
It is a mule.
It's a 1902 Liberty Head Nickel with a value of $3.00-$5.00 in average condition
Requires professional appraisal.
5 cents
This is an atom of nickel-60, i.e. one of the less abundant isotopes of nickel.
The element with atomic number 28 is Nickel (Ni). It is a transition metal in period 4 of the Periodic Table. It is the first element in the Nickel family. It has 28 electrons in 4 shells with 2 electrons in the outer shell.
A 1984 nickel with one side stamped with Jefferson and the other side blank is likely a novelty coin created after minting. It does not hold any numismatic value to collectors and is worth face value, which is 5 cents.
It could be a error in the printing of the coin but it is a v nickel.
It is Austrian empire1892-1914, 20-Heller, Nickel, 4.00g., 21mm.
Nickel is a chemical element with the atomic number 28, meaning it has 28 protons in its nucleus. This also means that nickel has 28 electrons surrounding the nucleus, as atoms are typically electrically neutral.