Chapter U1.10, Problem 8E

Interpretation Introduction

Interpretation:

The elements which can be used to make jewelry are to be selected and explained.

Concept introduction:

The periodic table is an organized chart of elements. The elements are arranged in groups and periods based on the similarities in their physical and chemical properties. Modern periodic table is a storehouse of information about the elements. The number of vertical columns is 18 which are called groups and there are 7 horizontal rows known as periods. Elements in the middle of the periodic table are not very reactive.

Answer to Problem 8E

Correct answer:

a. copper, Cu

d. platinum, Pt

Explanation of Solution

Reason for correct option:

1. Copper, Cu - Copper is a metal which is highly durable and malleable. It can be easily used to make jewelry. Copper is often used as an alloy to make jewelry. It does not rust easily and can be easily drawn into wires. It is not a reactive metal. Hence this is a correct option.
2. Platinum, Pt - Platinum is a shiny metal. It is malleable, non - reactive and a perfect candidate for jewelry making. Hence this is a correct option.

Both copper and platinum are placed in the middle of the periodic table.

Conclusion

Reasons for incorrect options:

b. neon, Ne- Neon, Ne is a noble gas, so it cannot be used to make jewelry. Hence, this option is not correct.

c. sodium, Na - Sodium, Na is a silvery white metal but it is too soft and very reactive. So it cannot be used to make good jewelry. Metal which is used to make jewelry should not react with other substances. Hence, this option is not correct.