Which of the following elements displays both metallic and non-metallic properties?AsulfurBphosphorusCcarbonDneon

To determine which element displays both metallic and non-metallic properties, we need to analyze the properties of each element listed: sulfur, phosphorus, carbon, and neon.

1. Sulfur (symbol: S): Sulfur is a non-metallic element. It is a yellow, brittle solid at room temperature and does not conduct electricity well. Therefore, sulfur does not display metallic properties.

2. Phosphorus (symbol: P): Phosphorus is also a non-metallic element. It is a highly reactive, waxy solid that can exist in several different forms. Like sulfur, phosphorus does not exhibit metallic properties.

3. Carbon (symbol: C): Carbon is a unique element that can display both metallic and non-metallic properties, depending on its form. In its purest form, carbon can exist as either graphite or diamond. Graphite is a non-metallic form of carbon, while diamond is a non-metallic form. However, carbon can also form metallic compounds, such as in the case of carbon nanotubes. Therefore, carbon is the element that displays both metallic and non-metallic properties.

4. Neon (symbol: Ne): Neon is a noble gas and is classified as a non-metal. Noble gases are known for their low reactivity and lack of metallic properties. Therefore, neon does not display metallic properties.

In conclusion, the element that displays both metallic and non-metallic properties is carbon (C).