The group of elements that act like metals and nonmetals are called metalloids, also known as semimetals.

Here's why:

* Metals are typically good conductors of heat and electricity, malleable, ductile, and shiny.

* Nonmetals are generally poor conductors of heat and electricity, brittle, and dull.

Metalloids exhibit properties of both metals and nonmetals, making them unique and useful in various applications.

Here are some key characteristics of metalloids:

* Variable conductivity: They can conduct electricity under certain conditions, but not as well as metals.

* Semiconductor properties: They are often used in semiconductors, which are materials that can control the flow of electricity.

* Brittle nature: They are generally brittle, similar to nonmetals.

Examples of metalloids include:

* Boron (B)

* Silicon (Si)

* Germanium (Ge)

* Arsenic (As)

* Antimony (Sb)

* Tellurium (Te)

* Polonium (Po)

Metalloids are essential for many modern technologies, including computers, solar panels, and transistors.