Question

Classification of elements with examples

Answer 1

Answer:

Definitions of groups, periods, alkali metals, alkaline earth metals, halogens, and noble gases. How metals, non-metals, and metalloids can be identified by the position on the periodic table.

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.
• Examples - Gold and Silver.

☞ 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.
• Examples - Hydrogen and Oxygen.

☞ 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.
• Examples - Silicon and Boron.

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