Answer: B, C
Step-by-step explanation:
The intermolecular forces between gas molecules is weaker than that of liquids and solids. Gases do not have a definite shape since the particles are not in fixed location. The particles are free to move thus, they have more kinetic energy. Therefore, the correct options are
B. They have very weak intermolecular forces between the atoms or molecules.
C. The particles are not in a fixed location.