SHAPE: it has definite shape
VOLUME: they have definite volume as their mass and density are fixed.
SHAPE:they have no shape and take the shape of the container.
VOLUME; they have volume as their mass and density are measurable even if they are not rigid.
SHAPE: they are free molecules and they cant take the shape of the container and they have no shape.
VOLUME: no definite volume as they couldn't be measured.