Question

Name two non-metals which are non-lustrous.

Answer 1

1. Definition of non-metals: The elements which form negative ions by gaining or accepting electrons are called non-metals.
2. Non-lustrous elements mean they do not have luster which means they do not have a shining surface.
3. Name two non-metals that are non-lustrous: Sulphur$\left(\mathrm{S}\right)$ and Phosphorous$\left(\mathrm{P}\right)$ are non-lustrous non-metals because they do not have a shining surface.
4. Iodine is an only non-metal which is lustrous.

Thus, Sulphur and Phosphorous are non-lustrous non-metals.