Question

Write about classification of elements​

Answer 1

The elements are classified as metals, nonmetals, and inert gases.

Classification is important because it allows scientists to identify, group, and its various such properties. For example elements that lie in the same column on the periodic table (called a "group") have identical valance electron configurations and consequently behave in a similar fashion chemically. For instance, all the group 18 elements are inert, or noble gases.It also helps us to understand how different elements form different compounds.

Hence we see that classification of elements is necessary.

Answer 2

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✒ Classification of Elements

✏ The elements are divided in 3 parts they are :-

1. Metals
2. Non-metals
3. Metalloids

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☞ What are Metals ?

• 78% of known elements are metals.
• They take up the left side of the Periodic Table.
• At room temperature, they are usually solids (except mercury).
• They usually have high boiling and melting points.
• They are shiny having metallic lustre.

☞ What are Non-metals ?

• They occupy the right-hand side of the Periodic Table.
• Most non-metals are brittle and are not malleable or ductile.
• At room temperature, they are usually solids or gases.
• They usually have low boiling and melting points (except carbon and boron).
• They are poor conductors of heat and electricity.

☞ What are Metalloids ?

• Metalloids exhibit some properties of metals as well as of non-metals. 
• They may have a metallic or dull appearance.
• They are usually brittle and are fair conductors of electricity.
• They may gain or lose electrons during chemical reactions.
• They form alloys with metals.

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