As a child I used to win bets that you could pick up a nickel with a magnetic most of the betters thought I was talking about a US nickel " a US nickel does not have the amount of nickel to work. But I would show them with a Canadian nickel I would win the bet. From the mint site--
1908 to 1919
Composition: 92.5% silver, 7.5% copper
Weight (g): 1.167
Diameter (mm): 14.494
Thickness (mm): n/a
1920 to 1921
Composition: 80% silver, 20% copper
Weight (g): 1.167
Diameter (mm): 14.494
Thickness (mm): n/a
1922 to 1942
Composition: 99% nickel
Weight (g): 4.54
Diameter (mm): 21.21
Thickness (mm): 1.7
1942 to 1943
Composition: 88% copper, 12% zinc (tombac)
Weight (g): 4.54
Diameter (mm): 21.21
Thickness (mm): 1.7
1944 to 1945
Composition: chrome plated steel
Weight (g): 4.54
Diameter (mm): 21.21
Thickness (mm): 1.7
1946 to 1951
Composition: 99.9% nickel
Weight (g): 4.54
Diameter (mm): 21.21
Thickness (mm): 1.7
1951 to 1954
Composition: chrome plated steel
Weight (g): 4.54
Diameter (mm): 21.21
Thickness (mm): 1.7
1955 to 1981
Composition: 99.9% nickel
Weight (g): 4.54
Diameter (mm): 21.21
Thickness (mm): 1.7
1982 to 1999
Composition: 75% copper, 25% nickel
Weight (g): 4.6
Diameter (mm): 21.2
Thickness (mm): 1.76
2000 to date
Composition: 94.5% steel, 3.5% copper, 2% nickel plating
Weight (g): 3.95
Diameter (mm): 21.2
Thickness (mm): 1.76