Chapter EH, Problem 55R

Solution

Interpretation : The three physical properties of noble gases are to be described.

Concept Introduction : The elements of group 18 are called a noble gas. Helium, neon, argon, krypton, xenon, and radon are among the elements of group 18.

Noble gases have neither color nor smell with lower melting and boiling points. They exist as non-metal.

The group 18 elements are inert gas because they have stable electronic configuration and follows the octet rule except for helium gas.

Group 18 elements are gases that have no color or smell.

All of them are nonmetals.

Down the group, their melting and boiling points rise.

But when compared with other groups, noble gas has lower melting and boiling points.

They have higher ionization energy and low electronegativity due to stable configuration.