
Interpretation :
The example of non-metals that are found in the gaseous state needs to be given.
Concept Introduction :
The periodic table is divided into two forms one is a vertical column and the other one is horizontal. The elements are differentiated as metals, non-metals and metalloids. The physical properties such as density, tensile nature, and conductors for heat and electricity help to explain about the metals and non-metals.

Answer to Problem 36A
Most of the non-metals in the periodic table are found in the gaseous state. Some of the examples are: nitrogen, hydrogen, helium, fluorine, oxygen, chlorine, neon, argon, krypton, xenon, and radon.
Explanation of Solution
Non-metals are generally poor conductors of heat and electricity, and they are hard in nature.
The metals are generally found in a solid state. Most of the non-metals are found in a gaseous state, only bromine is present in a liquid state. Also, few are present in solid state like carbon, sulfur, iodine etc.
The examples of gaseous non-metals are nitrogen, hydrogen, helium, fluorine, oxygen, chlorine, neon, argon, krypton, xenon, and radon.
The right side elements in the periodic table are termed as non-metals. There majority of the non-metallic elements are gaseous in state, only one non-metallic element is present in liquid which is bromine. Also, few are present in solid state like carbon, sulfur, iodine etc.
Chapter 3 Solutions
World of Chemistry, 3rd edition
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