Why are solids rigid ?

Why arteries are rigid? Give reasons

Why fats are solids at room temperature ?

Why do gases diffuse faster than solids or liquids ?

Is rubber band solid or liquid ? why?

Easily liquefiable gases are readily adsorbed on solids . Why?

Why do solids have a definite volume ?

Oxygen is a gas, but other elements of group 16 are solids at room temperature. Why?

What type of defect can arise when a solid is heated ? Physical property is affected by it and in what why ?