Materials are generally of 2 Types - Metals and Non-metals

Metals

A metal is a material which when freshly prepared or polished show lustre(shine)

They are malleable, ductile, sonorous and good conductor of heat and electricity

Example- Iron, Gold, Silver

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Non Metals

A non metal is a material which do not have properties of metals like lustre

They are non malleable, non ductile, non sonorous and bad conductor of heat and electricity

Example- Carbon, Sulphur, Phosphorous.

Non Metals.jpg

Difference Between Metals and Nonmetals

 

Metals

Non metals

They have lustre (shine)

They do not have lustre(shine)

They are malleable

(they can be broken into thin sheets)

They are non malleable

(they cannot be broken into thin sheets)

They are good conductor of electricity

(electricity can pass through them)

They are bad conductor of electricity

(electricity cannot pass through them)

They are good conductor of heat

(heat can pass through them)

They are bad conductor of heat

(heat cannot pass through them)

They are ductile

(they can be drawn into wires)

They are non ductile

(they cannot be drawn into wires)

They are sonorous

(they produce ringing sound)

They are non sonorous

(they do not produce  sound)

 

What are Metalloids?

Some products show property of both metals and nonmetals

they are called Metalloids

Example:- Silicon, Germanium, Arsenic

Metalloids.jpg

 

To summarize

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  1. Class 8
  2. Chapter 4 Class 8 - Materials : Metals And Non-Metals

Transcript

Different Types of Elements Metals Non-Metals Examples Iron Gold Examples Coal Wood Metalloids Examples Silicon Germanium Arsenic

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Davneet Singh
Davneet Singh is a graduate from Indian Institute of Technology, Kanpur. He has been teaching from the past 9 years. He provides courses for Maths and Science at Teachoo.