Question

10. he most abundant metal in the earth's crust
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Answer 1

Answer:

Aluminium is the most abundant metal in the earth's crust.

Answer 2

Answer:

Minerals, elements and the Earth’s crust

Introduction

Minerals are substances formed naturally in the Earth. They have a definite chemical composition and structure. There are over 3000 minerals known. Some are rare and precious such as gold and diamond, while others are more ordinary, such as quartz. Do you know of any more examples of minerals from the Earth?

Like all substances, minerals are composed of elements.

There are only about a hundred elements, and they are the basic building blocks of everything around us. They can be found either in their pure form or chemically combined with other elements to make compounds. A compound is two or more elements chemically joined together.

What you will need

A copy of the Periodic Table.

The activity

Elements in the Earth’s crust

Almost 99% of the minerals making up the Earth’s crust are made up of just eight elements. Most of these elements are found combined with other elements as compounds. Minerals are elements or compounds that occur naturally in the Earth’s crust. Rocks are mixtures formed of minerals. Just as elements are the building blocks of minerals, so minerals form the building blocks of rocks. Table 1 gives some information about the most common elements in the Earth’s crust in order of abundance.

Element name

Symbol

Percentage by weight of the Earth’s crust

Oxygen

O

47

Silicon

Si

28

Aluminium

Al

8

Iron

Fe

5

Calcium

Ca

3.5

Sodium

Na

3

Potassium

K

2.5

Magnesium

Mg

2

All other elements

1

Explanation:

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