What are Metals and Non-metals and its Properties Class 10 Science
CBSE Class 10 Science Notes - Metals and Non-metals is part of Class 10 Science Notes for Quick Revision. Here, discussed on Metals and Non-Metals, Its Properties & Difference between metals and non-metals
What are metals?
Metals, with the exception of hydrogen, are all elements that lose electrons during Chemical reactions to form positive ions. As a result, metals are electropositive elements with low ionization energies. They have a lustrous sheen, can reverberate sound, and are excellent heat and electricity conductors. Metals, with the exception of Mercury, are solids in nature.
Metals: Physical properties
Conduction: Metals are a good conductor of heat and electricity. This is why electric wires are made of metals such as copper and aluminum.
Malleability: Metals can be shaped. Metals will therefore be pounded into a thin film. Because of this property, iron is used in the construction of large ships.
Ductility: This property enables the metals to be drawn into thin wire. Due to this property, a wire is made of metals.
Melting and Boiling Point: Melting and boiling points are generally higher for the metals. (Sodium and potassium metals have low melting and boiling point, they are the exception.)
Density: Most of the metals have higher density.
Color: Except for gold and copper, most of the metals are grey in color.
Hardness: Except alkali metals such as sodium, potassium, and lithium, which are very soft metals. These metals can be sliced using a knife.
Strength: The majority of the metals are solid and have high tensile strength. As a result, large buildings are made of metals such as copper (Cu) and iron (Fe). (With the exception of Sodium (Na) and potassium (K), these are the soft metals).
State: At room temperature, metals are solid, whereas, mercury (Hg) is the exception.
Sound: Since metals produce a ringing sound, so, they are referred to as Sonorous. This can also be called a Metallic sound. This is why metal wires are used in the manufacture of musical instruments.
What are non-metals?
The elements that tend to gain electrons and form anions during chemical reactions are known as non-metals. These elements are electronegative, which means their ionization energies are higher. They're drab, frail, and inefficient in terms of heat and energy (graphite is an exception). Non-metal can be found in the form of gases, liquids, or solids.
Non-metals: Physical properties
Conduction: Non-metals are bad conductors of heat and electricity. Graphite, a carbon allotrope, is an exception is a good conductor of electricity.
Malleability and ductility: Non-metals are brittle.
Melting and boiling point: Non-metals usually have low boiling and melting points.
State: Non-metals can be liquid, solid, or gas.
Luster: Non-metals have a dull appearance. Diamond and iodine are exceptions.
Sonority: Non-metals do not produce a typical sound on being hit. Thus, they are not sonorous.
Density: Density for the most number of non-metals is low.
Color: Non-metals are in many colors.
Hardness: Non-metals are usually soft rather than hard. The diamond, on the other hand, is an exception; it is the hardest naturally occurring substance.
Difference between metals and non-metals
Metals | Non-metals |
Metals are ductile and malleable. | Non-metals are non-ductile and non-malleable. |
Metal produces a ringing sound on striking, which is said to be the sonorous property. | In the case of non-metals, they do not show this type of sonorous property. |
For heat and electricity, metals are good conductors. | For heat and electricity, non-metals are bad conductors, except graphite, which is a good conductor. |
Metals usually exist as a hard solid substance. | Non-metals usually exist in all three forms, i.e. solid, liquid, and gases. |
Learn More about metal and non-metal chemical properties.
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