A rock is an example of a solid because rocks cannot change their shape or size.
Particles are said to be in a solid state when they are densely packed and organized (in comparison to those in a gas or liquid) and are generally stable. Because the atoms or molecules of matter are often compressed and closely bonded by chemical bonds, solids tend to have a hard structure. These linkages might result in a regular lattice or an amorphous form.
Solid state in electronics refers to parts and systems made completely of semiconductors like silicon, germanium, or gallium arsenide. The most popular solid-state devices, transistors and diodes, are frequently paired with resistors, capacitors, and other parts to form integrated circuits (ICs). Transistors and ICs are components of every electronic system.
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