Answer: option (1) different physical properties and different chemical properties.
Justification:
1) Any chemical compound has its unique physical and chemical properties.
2) Although formed by the same elements, N and O, NO₂ and N₂O are different compounds, so each will have its proper physical and chemical properties.
3) The union of the atoms by chemical bonds confere the properties to a matter, so being the bonds in N₂O different to the bonds in N₂O means they are different compounds.
