Question

Classification of elements ?​

Answer 1

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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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Answer 2

Step-by-step explanation:

• The periodic table, also known as the periodic table of elements, is a tabular display of the chemical elements, which are arranged by atomic number, electron configuration, and recurring chemical properties. The structure of the table shows periodic trends.

• The seven rows of the table, called periods, generally have metals on the left and nonmetals on the right. The columns, called groups, contain elements with similar chemical behaviours. Six groups have accepted names as well as assigned numbers: for example, group 17 elements are the halogens; and group 18 are the noble gases. Also displayed are four simple rectangular areas or blocks associated with the filling of different atomic orbitals.The elements from atomic numbers 1 (hydrogen) through 118 (oganesson) have all been discovered or synthesized, completing seven full rows of the periodic table.

• The first 94 elements, hydrogen through plutonium, all occur naturally, though some are found only in trace amounts and a few were discovered in nature only after having first been synthesized.Elements 95 to 118 have only been synthesized in laboratories, nuclear reactors, or nuclear explosions.