2) Answer the questions.

1. Semiconductors include chemical compounds and metal alloys. 2. The atomic structure of semiconductors influences their properties by determining the energy bands and conductivity behavior. 3. Phenomena such as heating, cooling, and exposure to light influence semiconductors. 4. Semiconductor devices are applied for automatic control, transmission of sound, acceleration of chemical reactions, and conversion of heat into electricity. 5. Semiconductors help in solving engineering problems by providing efficient and compact solutions for energy conversion, signal transmission, and control systems.