Q: The three elements B, Si, and Ge are:

 

The three elements Boron (B), Silicon (Si), and Germanium (Ge) are classified as metalloids.

• Boron (B), Silicon (Si), and Germanium (Ge) possess properties that are intermediate between metals and non-metals, which is characteristic of metalloids.
• Metalloids have a mixture of metallic and non-metallic properties, making them semiconductors. They are good conductors of electricity at high temperatures but can act as insulators at lower temperatures.
• These elements are important in the electronics industry, particularly Silicon and Germanium, which are used in the manufacture of semiconductors for electronic devices.

The correct answer is (c) Metalloids. Boron (B), Silicon (Si), and Germanium (Ge) all exhibit the characteristics of metalloids, making them essential materials in modern electronics and semiconductor technology.