MY CART (5)

ITEM
DETAILS
MRP
DISCOUNT
FINAL PRICE
Total Price: R

There are no items in this cart.
Continue Shopping
                   

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

4 years ago

Share

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

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
Can chemical reactions happen at 0 degrees Kelvin? If so, how slowly would they occur?
 
 
Exactly 0K is an unattainable temperature. Temperatures can approach absolute zero but not be absolute zero. One of the ways to study very fast reactions is to cool them down to a few...
 
vikas yadav 3 months ago
 
Also, zero kelvin is absolute zero, complete cessation of all movement (including sub-atomic particles) No electron movement = no chemical reaction. at all.
 
vikas yadav 3 months ago
what is gibbs free energy
 
 
Gibbs free energy is the energy of a system which can be used for doing work. Mathematically, Gibbs free energy(G) of a system is the enthalpy(H) of the system minus product of the...
 
Adarsh 24 days ago
 
plz aprve The Gibbs free energy (SI units kJ/mol) is the maximum amount of non-expansion work that can be extracted from a thermodynamically closed system (one that can exchange heat and...
 
grenade 24 days ago
what is meant by acid base titrations
 
 
Titration is defined as the process of determining the volumes of reagents,required for the just completion of a reaction. Acid-base titration is one of the type of volumetric analysis.It is...
  img
Aarti Gupta 9 months ago
 
Acid base titration means the determination of concentration or rank of a solution with respect to water with a pH of 7. All chemical reactions cannot be considered as titrations. A reaction...
  img
Sunil Kumar FP 9 months ago
 
this is a simple question and you can get good things from solving this so just try
 
britto george 2 months ago
three centered bond is presnt in: a.NH3 b. B2H6 c. BCl3 d.AlCl3
 
 
B2H6 3 center bond 2 electron bond also called banana bond bcoz it flips very fastly and appear as banana approve if useful
 
ng29 2 months ago
 
Actually B 2 H 6 IS A DIMER and we know that ‘ELECTRONS ARE STANDING WAVES ‘ SO between 2 BORON ATOMS there is a GATHERING OF ELECTRON CLOUDS and it suffers REPULSION FROM bonded PAIR of...
 
Ankit Sharma one month ago
 
b > B2H6
 
aritra pal 2 months ago
Please explain why the reaction of neopentane yields 1- chloro- 2,2-dimethyl propane when treated with chlorine molecule during free radical mechanism ? why not 1,2 methyl shift to give...
 
 
in this type of reaction free carbocation is not formed and for any shift carbocation is necessary , so no shift occurs u can refer sn sanyal for reactions and mechanisms APPROVE IF USEFUL
 
ng29 27 days ago
 
because for 1,2 me shift carbocation is necessary free radical cannt be shifted mind it
 
grenade 27 days ago
 
here phenyl gp is observed because of its mesomeric capcity u asked for methyl
 
grenade 27 days ago
what is the configuration of second excited state of the element isoelectronic with O 2 or P - or Cl + is?
 
 
Dear student in excited state,an electron jumps from lower energy orbital to higher energy orbital.In this case the ground state configuration is [Ne]3s2,3p4.Now in first excited state first...
  img
Aarti Gupta 2 months ago
 
Isoelectronic species are those which have same number of electrons or similar electron configuration irrespective of nature of elements involved. O 2 ,P - and Cl + are isoelectronic as they...
  img
Aarti Gupta 2 months ago
 
can’t it become [Ne]3s 2 ,3p 6 …??
 
mansi dabriwal 2 months ago
View all Questions »