Use Coupon: CART40 and get 40% off on all online Study Material

Total Price: R

There are no items in this cart.
Continue Shopping
Get instant 20% OFF on Online Material.
coupon code: MOB20 | View Course list


why do elements like copper iron show variable valency .plzzz explain.............

4 years ago


Answers : (4)


Because copper and iron have same number of electrons in outermost orbit

4 years ago

The IUPAC definition limits valence to the maximum number of univalent atoms that may combine with the atom, that is the maximum number of valence bonds that is possible for the given element.
The oxidation state of an atom in a molecule gives the number of valence electrons it has gained or lost. In contrast to the valency number, the oxidation state can be positive (for an electropositive atom) or negative (for an electronegative atom). 
Not only d block elements have variable valency, Oxygen, Nitrogen, etc., some inert pair effected elements also having variable oxidation state

4 years ago

i think this is due to inert pair effect because when there is an increase in numbr of orbitals the electrons of outer most shell do held tightly and hence they do show variable oxidation states. infact not only copper, iron, nd d- blok elements but others do so for example thallium, lead, etc. summing up the d nd f orbitals show poor screening effect. hence the case so.

4 years ago

because they have variable electronic configuration

3 years ago

Post Your Answer

What is rate law
A rate law is a mathematical equation that describes the progress of the reaction. In general, rate laws must be determined experimentally. Unless a reaction is an elementary reaction, it...
SHANMUKESHWAR 2 months ago
The rate law gives mathematically dependance of rate of reaction on concentration of reactants.
Gavvala Ganesh 2 months ago
A rate law is a mathematical equation that describes the progress of the reaction.
RAKESH CHINDAM 2 months ago
what is Heterogeneous Equilibrium?
The equilibrium in which reactants and products are in two or more phases is called a heterogeneous equilibrium.
RAJU 2 months ago
A homogeneous equilibrium occurs when all reagents and products are found in the same phase (solid, liquid, or gas) and a heterogeneous equilibrium is when they are in different phases.
kalyan 2 months ago
Answer me quickly. What happens when magnesium metal is burnt in air?
Magnesium burns with dazzling brilliant white light in air to give MgO and Mg3 N2.see the reactions below. 2Mg + O2 →2 MgO and 3Mg + N2 → Mg3N2.thank you.
santosh kumar 2 months ago
15666 formation of mgo
anvesh 2 months ago
anvesh 2 months ago
what is the chemical formula of calcium carbonate?
SHANMUKESHWAR 3 months ago
caCo 3
A M S ARUN KRISHNA 3 months ago
what is the calorific value of producer gas?
sathish b 3 months ago
RAKESH CHINDAM 3 months ago
KUNCHAM SAMPATH 3 months ago
what is the chemical formula of copper oxide?
srujanyadav 3 months ago
sanjay 3 months ago
DURGA PRASAD 2 months ago
View all Questions »
More Questions On Physical Chemistry

Ask Experts

Have any Question? Ask Experts

Post Question

Answer ‘n’ Earn
Attractive Gift
To Win!!!
Click Here for details