Find this penny in my pocket change looks like a 1982 D but I can't tell if it's on the wrong planchard it weighs 3 grams so we can go from there thank you if I could get some help that be awesome
All of the information you could want or need about 1982 pennies can be found here: https://www.cointalk.com/threads/a-guide-to-1982-lincoln-cent-identification.55647/
Yours is the Large Date variety and is not rare. The link from RickMP above should tell you everything you need to know.
