first is a zincoln .. you can tell from the corrosion. of the set of 3, top 2 are large date other may be small date.
using a jewelers scale that goes 2 or 3 decimals, and not a food scales that rounds to the nearest whole gram.
It's probably zinc because of what clawcoins said. Copper doesn't bleed through those white zinc corrosion patches. You can see where the plating is on and off. Weight should be 2.5 grams. It's 3 billion-1 against being copper. But you never know. Yes in the bottom photo the top 2 are large dates the bottom is a small date.
can you show the make and model of the scale. I know it states capacity 750g x 0.1g but I'm curious. because it could round the information but have an accuracy of 0.1g Thus 2.9 to 3.1g is 3.0. plus those look large date anyways ...
The coins you show on your scale pics are the two dirty ones in the second pic.. In fact I think you're attempting a slight of hand illusion. You have introduced four different coins into the scenario IMHO.
looks like a light food scale - used a lot in tobacco products apparently. i'm curious if you get a decimal place on various items that you can weigh. you might want to get a jewelers scale that can go 2 or 3 decimal places. such as this https://www.amazon.com/dp/B071GYVQF...uPWNsaWNrUmVkaXJlY3QmZG9Ob3RMb2dDbGljaz10cnVl
Check what elsewhere? You have a 1982 D small date Copper plated zinc cent. If "elsewhere" tells you different then come back and prove it.
he's not getting the answer that he wants .. a copper 1982 D cent. Normally driven by false YouTube videos; investigating for facts does not matter.
The coin you showed on the scale is a large date. Both small dates I saw were clearly copperplated zinc.