Define physical properties of metal and non metal ?

Question

Answer

They are good conductors of sound. They are sonorous. Metals are ductile which means that they can be used to make thin wires. They are malleable which means that they can be pounded into thin sheets. Metals are usually solid at room temperature. However, there is an exception i.e. Mercury which is usually in liquid form. There are a few metals that have low density, soft, and have low melting and boiling points. These metals are alkali and alkaline earth metals, they are also highly reactive, and are rarely encountered in their elemental, metallic form. Some metals like sodium are so soft that they can be cut with a knife. Three magnetic metals are iron, nickel and cobalt. Steel is also magnetic but it is an alloy which contains iron. Metals tend to gain valence electrons. Also, metals have low electronegativity. Metals usually have one to three electrons in their outer shell.

Answer

Metals considered lusture, sonorous, conduction, malleablity, hardness , Ductility and non metals do not have these properties

Answer

Physical Properties of Metals and Non-metals

Physical properties are characteristics of matter that can be observed or measured without changing the substance's chemical composition. Metals and non-metals are two broad categories of elements in the periodic table, each possessing distinct physical properties. Let's explore these properties in detail.

Physical Properties of Metals:
Metals are generally solid at room temperature, except for mercury, which is a liquid. They exhibit various physical properties, including:

1. Lustre:
Metals have a shiny appearance due to their ability to reflect light. This property is called lustre. For example, metals like gold, silver, and copper possess high lustre.

2. Malleability:
Metals can be hammered into thin sheets without breaking. This property is known as malleability. Gold and silver are highly malleable metals commonly used in jewelry making.

3. Ductility:
Metals can be drawn into thin wires without breaking. This property is called ductility. Copper and aluminum are widely used in electrical wiring due to their high ductility.

4. Conductivity:
Metals are excellent conductors of heat and electricity. They allow the flow of electrons, making them good conductors. Copper is commonly used in electrical wiring, while silver is the best conductor of electricity.

5. Density:
Metals are generally dense materials, meaning they have a high mass per unit volume. They feel heavy when held in hand. For example, metals like lead and gold have high densities.

Physical Properties of Non-metals:
Non-metals have properties that are generally opposite to those of metals. Here are some common physical properties of non-metals:

1. Dull Appearance:
Non-metals lack the shiny lustre observed in metals. They often have a dull or matte appearance.

2. Brittle:
Non-metals are typically brittle and break easily when subjected to stress or pressure. Materials like sulfur and phosphorus are examples of brittle non-metals.

3. Insulators:
Non-metals are poor conductors of heat and electricity. They do not allow the flow of electrons and are therefore used as insulators. Rubber and wood are good examples of non-metal insulators.

4. Lower Density:
Non-metals generally have lower densities compared to metals. They feel lighter when held in hand. For instance, gases like hydrogen and oxygen are non-metals and have low densities.

5. Lower Melting and Boiling Points:
Non-metals generally have lower melting and boiling points compared to metals. For example, carbon, a non-metal, has a high melting point when it exists as diamond but a low boiling point.

In conclusion, metals and non-metals exhibit different physical properties. Metals are generally shiny, malleable, ductile, and good conductors of heat and electricity, while non-metals are dull, brittle, insulators, and have lower densities and melting points. Understanding these properties is crucial in various fields, including material science, engineering, and chemistry.

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