1982 Pennies
Small date vs large date
On the small date penny, tops of the numerals “1,” “9,” “8,” and “2” all align.
The “2” in the 1982 small date penny has a slight curvy shape in the main diagonal stem — whereas on the 1982 large date penny, it is much straighter.
Copper vs Zinc
The copper penny weighs around 3.11 grams.
The zinc penny weighs around 2.5 grams.