Question

Give an example of a gaseous non-metal.

Answer 1

As we know that in chemistry, a nonmetal is a chemical element that almost lacks the characteristics and properties of a metal. Physically, it tends to have a relatively low melting point, boiling point, and density. Also it is typically brittle when solid and usually has poor thermal conductivity and electrical conductivity. So we have to give an example of non metal which is generally found in gaseous state.

Complete answer:
Let us understand about non-metals followed by the examples as follows:-
-Non-metals: It is a chemical element in chemistry that almost lacks the characteristics and properties of a metal. Physically, it tends to have a comparatively low melting point, boiling point and density.
-Also it is typically brittle when solid and usually has poor thermal conductivity and electrical conductivity which means they are not good conductors and hence named as insulators as well.
-Chemically, they tend to have relatively electron affinity, high ionization energy and electronegativity. Also they gain or share electrons when they react with other elements and compounds. There are seventeen elements that are generally classified as nonmetals which are shown below:-
Mostly gases: hydrogen, helium, nitrogen, argon, oxygen, fluorine, chlorine, krypton, neon, xenon and radon
Only liquid in non-metals: bromine
Few are in solid state: carbon, phosphorus, sulfur, selenium, and iodine
-Hence an example of gaseous non-metal is Oxygen.

Note:
-Remember that to solve such types of questions, you study the properties and characteristics of metals and non-metals.
-Non-metals mostly cover the p-block elements of the periodic table (most right side).