Fourth period metalliod a very semiconductor material

The metalloids, elementes with properties in between metals and no metals are: boron, B; silicon, Si; germanium, Ge; arsenic, As; antimonium, Sb; tellurium, Te; polonium, Po; and astatine, At.

Germaniun and arsenic belong the the fourth period.

Germanium is an important semiconductor, very used in transistors and integrated circuits, while arsenic has different uses (it is not a semiconductor).

Therefore, the answer is germanium.

Organisms in biological ecosystems connect to one another through their need for matter as well as energy. Every organism needs molecules like proteins, carbohydrates, and fats to provide the raw building materials for their cells.