Rare 1982 pennies 0

[Royism]

I am very new at collecting. I have seen blogs where people have asked about their coins to Joshua, and accordingly, sent pictures. Can anyone tell me if these are the small date 1982 pennies. They all weigh the same at 3 grams. Also, 3 have no mint mark. Anything special about that? 

[Greenstang]

Welcome to the Forum

Probably the most asked question on any coin forum.

Yours are all Large Date. The no mm means they were struck in Philadelphia.