Question

7 which of the following elements is a metalloid?
a germanium (ge)
b aluminum (al)
c hydrogen (h)
d carbon (c)

Explanation:

To determine which element is a metalloid, we recall the definitions: Metalloids have properties intermediate between metals and non - metals.

• Option A: Germanium (Ge) is a well - known metalloid. It shows properties of both metals (like some electrical conductivity) and non - metals.
• Option B: Aluminum (Al) is a metal. It has typical metallic properties such as high electrical and thermal conductivity, malleability, and ductility.
• Option C: Hydrogen (H) is a non - metal. It is a gas at room temperature and has properties characteristic of non - metals.
• Option D: Carbon (C) (in most of its allotropes like diamond and graphite) is a non - metal. Graphite has some metallic - like conductivity but carbon is generally classified as a non - metal.

Answer:

A. germanium (Ge)