What is a non metal and metal
Answers
In chemistry, a nonmetal is a chemical element that mostly lacks the characteristics of a metal. Physically, a nonmetal tends to have a relatively low melting point, boiling point, and density. A nonmetal is typically brittle when solid and usually has poor thermal conductivity and electrical conductivity.
A metal is a material that, when freshly prepared, polished, or fractured, shows a lustrous appearance, and conducts electricity and heat relatively well. Metals are typically malleable or ductile.
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Answer:
Explanation:
Metals and Nonmetals are different types of materials present around us. Elements can be divided into metals and nonmetals and it is important to know whether a particular element is a metal or nonmetal. Metals (like copper and aluminum) are good conductors of heat and electricity, while nonmetals (such as phosphorus and sulfur) are insulators. Materials are distinguished as above, based on their properties.
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What are Metals?
Majority elements in the periodic table are metals. This includes alkali metals, transition metals, lanthanides, actinides and alkaline earth metals. Metals are separated by nonmetals on a periodic table through a zigzag line starting from carbon, till radon. The elements between the two are phosphorus, selenium and iodine.
These elements and elements right to them in the periodic table are nonmetals. Elements present just to the left of the line are termed as semimetals or metalloids. These will have the combined properties of both metals and nonmetals.
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What are Non metals?
Very few elements in the periodic table are non-metals. These are present on the right-hand side in the periodic table. Elements that come under non-metals are Sulphur, carbon, all halogens, phosphorus, hydrogen, oxygen, selenium, nitrogen and noble gases.
In the periodic table, non-metals are located left of the halogens and to the right of the metalloids. Since noble gases and halogens are also non-metals, these elements are often referred to as non-metals.
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Properties of Metals
Physical Properties of Metals
Some physical properties of metals are listed below.
Shiny (lustrous) in nature
Metal is a good conductor of electricity and heat
Density and melting point is high
Mouldable (Malleable)
Ductile
At room temperature, it is in solid form except for mercury
Opaque
Chemical Properties of Metals
Some chemical properties of metals are listed below.
Easily corrodible
Can lose electrons
Form basic oxides
Have low electronegativities
Good reducing agents
Properties of Non-Metals
Physical Properties of Non-metals
Some physical properties of non-metals are listed below.
Poor conductors of electricity and heat
Non-Ductile metals
Brittle solids
Maybe solids, liquids or gases at room temperature
These are not sonorous
Transparent
Chemical Properties of Non-metals
Some chemical properties of non-metals are listed below.
The number of electrons in the outer shell is generally 4-8
Easily gain or lose valence electrons
Form acidic oxides whenever they come in contact with oxygen
High electronegative elements
Great oxidizing agents
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