Oh, dude, Lead IV nitrate is Pb(NO3)4. It's like lead, but with a fancy nitrate group hanging out with it. So, if you ever need to impress someone with your knowledge of chemical formulas, you can casually drop Pb(NO3)4 into the conversation.
Pb3N2 is a chemical compound made up of lead (Pb) and nitrogen (N) atoms in a ratio of 3:2. It is also known as lead nitride and is a dark-colored solid that is highly sensitive to moisture and air. Lead nitride has limited practical applications due to its high reactivity and toxicity.