CHARACTERISTICS OF METALS from the unit metals.pptx

CHARACTERISTICS OF METALS from the unit metals.pptx

1. WELCOME

2. CHARACTERISTICS OF METALS PRESENTED BY; ARCHA S R BEd PHYSICAL SCIENCE

3. Metals are natural compounds of earth’s crust, in which they are generally found in the form of metal ores, associated both with each other and with many other elements. They are also naturally present in the rocks washed by surface water and groundwater and in atmospheric dust.

4. EXAMPLES OF METALS

5. CHARACTERISTICS OF METALS Metal is very strong and durable and therefore is used to make many things. These are used for making automobiles, satellites, cooking utensils, etc. Most metals are hard but some are not. Sodium and potassium are such metals that can be cut by knife whereas  mercury  is a liquid metal at room temperature. Iron is solid in nature.

6. 1.MALLEABILITY Malleability is the property of substances which allows them to be beaten into flat sheets. Aluminium sheets are used in the manufacturing of Aircrafts because of their lightweight and strength. Other metal sheets are used in automobile industries, for making utensils, etc. Therefore, metals are malleable.

7. 2.DUCTILITY Ductility is the ability of the material to be stretched into a wire. This ability allows metals to be drawn into wires and coupled with their durability, find applications as cable wires and for soldering purposes. Because Metal can be drawn into wires we can say that metals are ductile.

8. 3.METALLIC LUSTRE Metals possesses a shining surface in their pure form. This property is called metallic lustre . Usually, all the metals have a shiny appearance but these metals can also be polished to have a shiny appearance

9. 4. SONORITY Sonority is the property of metals to produce a ringing sound when struck with a hard surface. For example, when a bell is struck, it produces a ringing sound due to its sonority.  Most metals are sonorous in nature, including copper, aluminum, tin, silver, and iron. Because of this, they are used in many instruments, such as bells, cymbals, doorbells, and strings of musical instruments like the violin and sitar.

10. THANK YOU