Question

Define non-metals.

Answer 1

Definition of Non-metals: The elements which form negative ions by gaining or accepting electrons are called non-metals.

Physical Properties of Non-Metals:

• Non-Metals are Brittle.
• Non-Metals are Non-lustrous or dull in appearance
• Non-Metals are soft
• Non-Metals are poor conductors of Heat and Electricity
• Non-Metals are Non-Sonorous
• Non-Metals have low Melting Point and Boiling Point
• Non-Metals have Low Densities
• Non–Metals have Different Colours
• Non-Metals have Low Tensile Strength

Examples: Carbon$\left(\mathrm{C}\right)$, Oxygen$\left(\mathrm{O}\right)$, Sulphur$\left(\mathrm{S}\right)$, Nitrogen$\left(\mathrm{N}\right)$, etc. are non-metal elements.