1. Shape and Volume:
* Shape: Solids have a fixed shape. This means they resist changes in their shape. You can't easily mold or deform them without applying considerable force.
* Volume: Solids also have a fixed volume. This means they occupy a specific amount of space that doesn't easily change.
2. Molecular Structure:
* Arrangement: The molecules in a solid are arranged in a highly ordered, fixed structure. This structure is responsible for the solid's rigidity.
* Distance: The molecules in a solid are closely packed together and maintain a relatively constant distance from each other.
3. Key Note:
While the shape and volume of a solid are fixed, it's important to remember that solids can undergo slight changes in volume due to factors like temperature.
In Summary:
The defining characteristics of solids that generally don't change are their fixed shape, fixed volume, and the highly ordered, close-packed arrangement of their molecules.
