CLASSIFICATION OF ELEMENTS

 CLASSIFICATION OF ELEMENTS:

Elements:

 The simplest form of pure substance, which cannot be divided

 into smaller parts by physical and chemical methods

METALS:

1.     All are solids (except mercury Hg-liquid metal) ·

2.     They are Lustrous(shiny) ·

3.     Strong&hard(except Na,K weak-soft metals ) ·

4.     Malleable(making metals into thin sheets)(except Zinc) ·

5.     Ductile (making into wires)(except Zinc) ·

6.     Sonorous (making a different ringing sound) ·

7.     Has high tensile strength (holding of heavy loads)

8.     Has high densities

9.     high melting points and boiling points ·

10.                        Redusing agents(form cations)

10.Good conductors of heat & electricity

Ex: Li, Na, K, Ca, Mg, Zn, Pb, Cu, Al, Ag, Au, Hg, Pt etc

 

NON METALS:

1.     Solids I2,S,P,Diamond(C),Graphite(C)

2.     Liquids-Br2 ·

3.     Gases-H2, Cl2, F2, N2 etc ·

4.     They are non Lustrous(except diamond,Graphite,Iodine) ·

5.     Weak & soft (except diamond-hard) ·

6.     Non malleable ·

7.     Non ductile ·

8.      Non sonorous ·

9.     Has low tensile strength ·

10.            Has low densities and

11.            low melting points and boiling points ·

12.            Bad conductors of heat & electricity 

Ex: H, C, N, O, F, Cl, Br, S, P etc

 

METALLOIDS;

These elements are having both the properties of metals & nonmetals

 Ex:- B,Si, Ge, As, Bi,Te

 etc