Question

state any two characteristics of molecule

Answer 1

A molecule has only one configuration, i.e. a definite spatial arrangement of the atoms between each other in the molecule. Isomerism is a characteristic of spatial structure of certain molecules, in particular those which have an asymmetrical carbon, i.e. a carbon bound to four different substituents.

Answer 2

All molecule have definite mass and size.
THE mass is equal to sum of masses of all individual atoms in molecular structure