what is Atomicity & Valency ?????

what is the difference between them ?

 ability of an element to combine and form a compound is called valency.

atomicity is the number of atoms present in a molecule of an element.

valency is the phenomenon of forming chemical bonds between atoms

(the difference is  same as the definitions.)

 atomicity is the number of atoms present in a molecule of an element..compound...or wdeva it is......

wheras when we r toking of valencies valency is the no. of electrons  it can gain..and the no of electrons it can lose.......if the outer most shell is near to complete it would be rather eaiser to gain electrons..and if the no. of electrons in the outermost shell is less..it would lose electrons..........or otherwise............if it is half then.it can either share......oll the metals..have the tendency to gain electrons..they r ELECTROPOSITIVE......nd o the..non metals have the tendency to loose electrons..so they r ELECTROPOSITIVE..hope  u got it at a glance..!... 

 the no. of atoms in a molecule of an element is known as its atomicity.

the no. of electrons in the valence shell of an atom which can take part in a reaction is called its valency.

hey,

valency:

the no. of electrons which an atom needs to gain or can lose or share to form bonds is called its valency.

 the first definition of valency is wrong...its of valence electrons....

sry!

see the second answer...

its rt...

:D

 ....the no. of electrons it needed to become stable...

thumbzz up..yr atleast..

..thnxx....

 thanks meritnation experts & students !!!!!!!!!!!!!!