Yes, but their surface area is 100% copper. You are likely to pass the penny before digesting all the way through to the zincky center. And 1982 was the year

Yes, but their surface area is 100% copper. You are likely to pass the penny before digesting all the way through to the zincky center. And 1982 was the year the US penny switched from copper to copper-clad zinc. Some from that year are pure, and others are clad. The pure pennies are heavier. Or you could file a notch in an edge and see if the center reflects whitish or reddish.