Question

Classify each of the following as a conductor, insulator, or semiconductor:

1. carbon (graphite)
2. sulfur
3. platinum.

Short answer

1. Carbon (graphite) is a conductor
2. Sulphur is an insulator
3. Platinum is a conductor

Step-by-step solution

Classification of elements

Elements that conduct heat and electricity in high conductivity range are known as conductors whereas elements with very low heating and electrical conductivity range are termed insulators.

Elements that lie in between the range of conductors and insulators are known as semiconductors.

Classification of graphite, Sulphur, and platinum

1. Graphite is a form of carbon with high conductivity which is been used in the electrodes used in electroplating, etc.
2. Sulphur consists of 6 valance electrons which are tightly bound and thus can’t be moved leading to low conductivity.

Platinum is a ductile material with only one valance electron thus it is highly conducting in nature.