Question

question 11. the element in group 15, period 5, of the periodic table is classified as a noble gas nonmetal metalloid metal

Explanation:

The element in Group 15, Period 5 of the periodic table is antimony (Sb). Antimony has properties intermediate between metals and non - metals, which classifies it as a metalloid. Noble gases are in Group 18, non - metals have different characteristic properties compared to antimony, and while it has some metallic character, it is not a pure metal.

Answer:

C. metalloid