How to determine whether mold, lead, asbestos, radon etc are present in a property for sale?

[Corey Demuth]

Is there a way to find out whether a house or condo may have lead, asbestos, or mold before you purchase it? What about radon - does a home inspector typically test for this in SFRs or MFRs? 

(Let's assume for a moment that the seller/agent may not be honest, in other words I am asking how do you know other than "the listing agent said there is no lead.")

Are there any other health hazard items that you check for before purchasing?