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

3 years ago

Share

Answers : (4)

                                        

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

3 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

3 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.

3 years ago
                                        

because they have variable electronic configuration

2 years ago

Post Your Answer

More Questions On Physical Chemistry

Ask Experts

Have any Question? Ask Experts
Post Question
 
Answer ‘n’ Earn
Attractive Gift
Vouchers
To Win!!!
Click Here for details
Water is SP 2 Hybridisation but is shown in text book as SP 3 Hybridisation , why ? Can you explain?
 
 
In a water molecule, two sp3 hybrid orbitals are occupied by the two lone pairs on the oxygen atom, while the other two are used for bonding with hydrogen. The H-O-H bond angle is less than...
 
CHARISHMA 13 days ago
in exams so many times it is asked that what is the dipole moment of dis n dis compond or 1.64 or anythng else is d dipole moment of which element...how dis will b calculted....
 
 
Please ask a particular question we will help you , i am not able to understand your quetstion completely what you want to ask, please ask the direct question.
  img
Sher Mohammad 3 months ago
 
Write the formula for dipole moments on your paper: |m| = d * R. In this formula, |m| stands for the absolute value of the dipole moment, meaning you will express the dipole moment as a...
 
dfdffdfddffd 3 months ago
hydrolysis constant
 
 
The salts made up of weak acid or weaak base or both when dissocated partially, then its conjugate further reacts with water and this process is called hydrolysis. For example, let a salt...
  img
Naveen Kumar 8 days ago
Why is a person with high blood pressure asked to reduce salt!
 
 
Humans ingest sodium by eating salt in food and occasionally in medications. Most people will simply excrete excess sodium in the urine, and we also lose sodium and water through...
  img
Sunil Kumar FP 2 months ago
In cannizaro reaction, after the heterolytic cleavage of the pi bond due to the attack of the OH - ion at the carbonyl carbon, the pi bond is reformed and a H- ion leaves. Why is it more...
 
 
http://www.askiitians.com/revision-notes/chemistry/aldehydeketone-and-carboxylic-acid/ . Please go through this...
  img
Harishwar 17 days ago
 
I found out the answer. The OH- attacks the electrophillic carbonyl carbon and the pi bond of the carbonyl oxygen is broken and the electron moves to the oxygen. Since the medium is basic in...
 
Amogh 17 days ago
View all Questions »