METALS by

abhiramispillai — 2020-09-11 16:50:29 UTC

INTRODUCTION

As scientists discovered elements there was a need to classify them. Thus elements were classified based on their properties.

Try to list from the periodic table some of the elements that are familiar to you.

Hydrogen
Iron
Gold

Are there metals in this list? Which are they?
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abhiramispillai — 2020-09-11 17:12:27 UTC

PROPERTIES OF METALS

Malleability
Ductility
Hardness
Metallic luster
Good conductors
Sonarity

abhiramispillai — 2020-09-11 17:17:28 UTC

Commonly used metals

abhiramispillai — 2020-09-11 17:21:11 UTC

MALLEABILITY

Metals can be beaten into thin sheets by hammering. This property is known as malleability.

Try to find instances where malleability of metals are employed

Aluminium foil used to wrap chocolates.

abhiramispillai — 2020-09-11 17:25:53 UTC

Gold is the most malleable metal.

abhiramispillai — 2020-09-11 17:28:46 UTC

Video on malleability

abhiramispillai — 2020-09-11 17:31:53 UTC

DUCTILITY
Metals can be drawn into thin wires.This property is known as ductility.

The filaments of electric bulbs are made of fine wires of Tungsten. Tungsten can be drawn into thin wires. Hence it is used to make the filament.
Platinum is the most ductile metal.

abhiramispillai — 2020-09-11 17:32:57 UTC

Additional information

abhiramispillai — 2020-09-12 13:59:48 UTC

HARDNESS OF METALS

Hardness is another property of metals.

Eg.Copper, Aluminium ,Iron.

But there are few metals which are soft.

Eg. Sodium, Gallium,Cesium, Lithium, Potassium

abhiramispillai — 2020-09-12 17:00:57 UTC

METALLIC LUSTER

abhiramispillai — 2020-09-12 17:03:09 UTC

THERMAL CONDUCTORS

Metals are thermal conductors.The ability to conduct heat is an important property of metals.This property is known as thermal conductivity.

abhiramispillai — 2020-09-17 07:44:55 UTC

SONORITY

The ability of metals to produce sound when tapped with a hard material is known as sonority.

abhiramispillai — 2020-09-17 09:15:27 UTC

SONORITY

abhiramispillai — 2020-09-18 11:11:50 UTC

THERMAL CONDUCTORS

abhiramispillai — 2020-09-18 11:33:09 UTC

CONDUCTORS OF ELECTRICITY

abhiramispillai — 2020-09-18 11:47:31 UTC

List the appropriate uses and associated physical properties of metals.

(Electrical conductivity,To make utensils, To make farming tools, Sonority, Hardness, To make aluminium foils to wrap food materials, Malleability, To make bells used in places of worship, Thermal conductivity)