Chapter U1.23, Problem 1TAI

Interpretation Introduction

Interpretation:

Types of compounds that can be made from transition metals is to be explained.

Concept introduction:

Metals located in the middle of the periodic table are called transition metals. These metals are brightly colored so they are used in paints and pigments. Many such metals which are used in our daily life are copper, iron, nickel, silver and gold.

Answer to Problem 1TAI

Transition metals form ionic compounds with nonmetals. Most of these compounds are brightly colored and are used in making pigments. Transition metals can have more than one charge. For example, copper, Cu, has a charge of + 1 in copper (I) oxide and a charge of + 2 in copper (II) carbonate.

Explanation of Solution

Transition metals are those elements that are widely used in our daily lives. From iron to copper to gold, transition metals form various ionic compounds with nonmetals. These compounds are very brightly colored. Example: cobalt (II) oxide (cobalt blue), malachite (blue - green), umber (brown), etc. they are used to make pigments for paints. Gem stones also contain transition metal compounds.

Transition metal cations have different charges in different compounds. Chemical formulas can be used to determine the charge of the ion. Two different iron compounds formed with oxygen are Fe₂O₃ and FeO. Each compound has different charge on iron cation. One is iron (III) oxide and other is iron (II) oxide.

Conclusion

Transition metals are responsible for colors in paints, pigments and gem stones. They combine with nonmetals to form ionic compounds. Most transition metals have more than one ion charge.