What Are Allotropes of Metalloids and Metals

The video discusses allotropism, where elements exist in different forms with distinct properties. Oxygen, silicon, and iron are highlighted as examples. Silicon is crucial in electronics and solar cells, existing in crystalline and amorphous forms. Iron's allotropes vary with temperature and pressure, featuring different cubic structures. The video emphasizes the importance of these elements in technology and innovation.

What is an example of an element that can exist in different allotropes with distinct properties?

• Oxygen

• Helium

• Hydrogen

• Nitrogen

Which form of silicon is used in the circuits of electronic devices?

• Gaseous silicon

• Liquid silicon

• Crystalline silicon

• Amorphous silicon

Which allotrope of carbon shares a similar tetrahedral structure with crystalline silicon?

• Carbon nanotube

• Diamond

• Graphite

• Fullerene

What structure do the common allotropes of iron, such as alpha, beta, and delta iron, share?

• Tetrahedral

• Face-centered cubic

• Body-centered cubic

• Hexagonal close-packed

Which of the following metals also exhibit allotropy?

• Silver

• Gold

• Lithium

• Copper