Interpretation
The metals which have only one oxidation state should be determined from the given metals.
Concept introduction:
Transition element is one which can form one or more stable ions with a partially occupied d-subshell. Most of the
Oxidation state is the difference between the numbers of electrons associated with an atom in a compound.
In ions the oxidation state is the ionic charge
In covalent compounds the oxidation state corresponds to the formal charge.
In elements oxidation state is assumed to exist in the zero oxidation state.
The variable oxidation state of transition elements is due to their small energy difference between the 4s and 3d subshells.
Some elements with variable oxidation states are listed below,
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General Chemistry: Atoms First
- The following reactions all occur in a blast furnace. Which of these are redox reactions? (a) 3Fe2O3(s)+CO(g)2Fe3O4(s)+CO2(g) (b) Fe3O4(s)+CO(g)3FeO(s)+CO2(g) (c) FeO(s)+CO(g)Fe(l)+CO2(g) (d) C(s)+O2(g)CO2(g) (e) C(s)+CO2(g)2CO(g) (f) CaCO3(s)CaO(s)+CO2(g) (g) CaO(s)+SiO2(s)CaSiO3(l)arrow_forwardWhat is the oxidation state of Cl in CaOCl2 ?arrow_forwardThe oxidation state of chromium in CrAsO4 is: (a) 0 (b) +1 (c) +2 (d) +3 (e) -3arrow_forward
- What is the oxidation state of the halogen in each of the following?(a) H5IO6(b) IO4−(c) ClO2(d) ICl3(e) F2arrow_forwardWhat are the oxidation numbers of the following: (a) Si in SiO2 (b) N in NH4+ (c) N in NH3 (d) N in N2Oarrow_forwardWhat is the highest oxidation state for (a) Nb; (b) Y; (c) Tc?arrow_forward
- 3. Determine the oxidation state of the specified element in the following: (a) Cr in Cr,0,2- (c) Fe in Fe203 (b) Mn in MnO2 (d) Ag in AgClarrow_forwardPredict the products of each of the following reactions and then balance the chemical equations.(a) Fe is heated in an atmosphere of steam.(b) NaOH is added to a solution of Fe(NO3)3.(c) FeSO4 is added to an acidic solution of KMnO4.(d) Fe is added to a dilute solution of H2SO4.(e) A solution of Fe(NO3)2 and HNO3 is allowed to stand in air.(f) FeCO3 is added to a solution of HClO4.(g) Fe is heated in air.arrow_forward(a) Why do transition elements show variable oxidation states? (i) Name the element showing maximum number of oxidation states among the first series of transition metals from Sc (Z = 21) to Zn (Z = 30). (ii) Name the element which shows only +3 oxidation state. (b) What is lanthanoid contraction? Name an important alloy which contains some of the lanthanoid metals.arrow_forward
- Copper corrodes to cuprous oxide, Cu2O, or cupric oxide, CuO, depending on environmental conditions. (a) What is the oxidation state of copper in cuprous oxide?arrow_forwardAccount for the following : (a) Copper shows its inability to liberate hydrogen gas from the acids. (b) Scandium (Z = 21) does not exhibit variable oxidation states.arrow_forwardWhat is the coordination number for(a) an octahedral void(b) a tetrahedral void.arrow_forward
- Chemistry by OpenStax (2015-05-04)ChemistryISBN:9781938168390Author:Klaus Theopold, Richard H Langley, Paul Flowers, William R. Robinson, Mark BlaserPublisher:OpenStaxChemistry: The Molecular ScienceChemistryISBN:9781285199047Author:John W. Moore, Conrad L. StanitskiPublisher:Cengage Learning