The non-metal which is lustrous.

• The non-metal which is liquid.
• Non-metal which is the conductor of electricity.
• The non-metal which is the hardest metal substance known.

Non-metals exhibit a variety of unique properties. Here’s a breakdown of the specific non-metals you mentioned:

Lustrous Non-Metal

The non-metal that is known for its lustrous appearance is iodine. It has a shiny, metallic-like sheen in its solid form, which is quite unusual for non-metals.

Liquid Non-Metal

The only non-metal that is liquid at room temperature is bromine. It appears as a reddish-brown liquid and is known for its strong odor.

Electrical Conductor

Graphite is a non-metal that conducts electricity. It is a form of carbon and is used in applications like batteries and electrodes due to its ability to allow electric current to pass through.

Hardest Non-Metal Substance

The hardest non-metal substance known is diamond, which is also a form of carbon. Diamonds are renowned for their exceptional hardness and are often used in cutting tools and jewelry.

Each of these non-metals showcases distinct characteristics that set them apart from others in their category.