What are Elements

Elements are the basic form of matter .

They cannot be broken down into simpler substances by chemical reactions

Examples of Elements:

  • Iron (Fe)
  • Copper (Cu)
  • Oxygen (O)
  • Carbon (C)
  • Silicon (Si)
  • Boron (B)

Different Types of Elements

All the elements can be categorized into Metals, Nonmetals and Metalloids as shown below

 

Iron → Metals
Copper


Oxygen → Nonmetals
Carbon


Silicon → Metalloids
Boron

 

Are Elements Natural or Manmade?

Total number of elements are more than 100

Out of this, 92 are natural

Example - Carbon, Hydrogen, Oxygen

Rest are man-made

Example - Americium, Curium, Californium



Are these Elements Solids, Liquid or Gases?

Majority of them are Solid

Example - Iron, Copper

 

Eleven are found in Gaseous State

They are - Hydrogen ( H ) ,Nitrogen ( N ), Oxygen ( O ), Fluorine ( F ), Chlorine ( Cl ), Helium ( He ), Neon ( Ne ), Argon ( Ar ), Krypton ( Kr ), Xenon ( Xe ), Radon ( Rn )

 

2 are found in Liquid State

They are - Mercury, bromine


Note - Elements like Gallium, Cesium become liquid at slightly above room temperature - 303K or 30 O C

  1. Class 9
  2. Chapter 2 Class 9 - Is Matter Around Us Pure

About the Author

Davneet Singh's photo - Teacher, Computer Engineer, Marketer
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.