A good example of an element that is brittle and a poor conductor of electricity is sulfur.

Here's why:

* Brittle: Sulfur is a non-metal, and non-metals are typically brittle. This means they break easily under stress, rather than bending or deforming.

* Poor Conductor: Sulfur is a poor conductor of electricity because it has a tightly bound structure with few free electrons to carry a charge.

Other elements that share these characteristics include:

* Phosphorus

* Selenium

* Tellurium

* Iodine

Let me know if you'd like more information about any of these elements!