A shiny copper penny that isn't.

7DOS Periodic Table Macro Monday

For six word story.

 

The United States one-cent coin, often called a penny was made 100% of copper from 1793 to 1857. It was then made from 1856 to 1864 of 88% copper, 12% nickel. From 1864 to 1982, with the exception of the 1943 steel cent, it was made 95% copper and 5% other metals. Since 1982 it has been made of copper-plated zinc (97.5% zinc, 2.5% copper).

Done