Question

1. classify the following as either a metal, metalloid or a non - metal
2. si
3. na
4. al

Explanation:

Si (silicon) is a metalloid as it has properties of both metals and non - metals. He (helium) is a non - metal, a noble gas. Al (aluminium) is a metal with typical metallic properties like good electrical conductivity and malleability.

Answer:

1. Metalloid
2. Non - metal
3. Metal