A nondestructive test has to be suggested to find whether the given dark shiny solid is iodine or a metallic element. Concept Introduction: According to physical and chemical properties, the elements can be further divided into metals, non-metals and metalloids. In a group, the metallic character of an element increases from top to bottom whereas in a period, it decreases from left to right. The classification elements in the periodic table as metals, nonmetals, or metalloids can be given as Metals are elements that usually contain 1-3 outer shell electrons. Metals look shining and lustrous and are malleable and ductile. They are also good conductors of heat and electricity. They have low ionization energy and tend to lose electrons forming cations. They are most likely to form ionic compounds. Nonmetals are elements that usually contain 4-8 outer shell electrons. They cannot conduct heat and electricity and are brittle. Also they have high electron affinities and tend to gain electrons forming anions. They are most likely to form molecular compounds.

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Chapter 8, Problem 8.11QP

Interpretation Introduction

Interpretation:

A nondestructive test has to be suggested to find whether the given dark shiny solid is iodine or a metallic element.

Concept Introduction:

According to physical and chemical properties, the elements can be further divided into metals, non-metals and metalloids.

In a group, the metallic character of an element increases from top to bottom whereas in a period, it decreases from left to right.

The classification elements in the periodic table as metals, nonmetals, or metalloids can be given as

Metals are elements that usually contain 1-3 outer shell electrons. Metals look shining and lustrous and are malleable and ductile. They are also good conductors of heat and electricity. They have low ionization energy and tend to lose electrons forming cations. They are most likely to form ionic compounds.

Nonmetals are elements that usually contain 4-8 outer shell electrons. They cannot conduct heat and electricity and are brittle. Also they have high electron affinities and tend to gain electrons forming anions. They are most likely to form molecular compounds.

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