– When chromium loses 3 electrons then the electronic configuration becomes (Ar) 3d3 which is most stable because at the t2g level the dxy, dyz and dxzorbitals are half-filled . – It means that one electron is present in each orbital due to which it is more stable than the d5 configuration.
Which is more stable Cr3+ or Cr2+?
ANS: CuCl2 is more stable due to more hydration energy. ... ANS: (i) It is because Cr2+ loses electron to become Cr3+ which is more stable due to half filled t2g orbitals, whereas Mn3+ will gain electron to become Mn2+ which is more stable due to half filled Page 2 2 d-orbitals.
What is the most stable ion of chromium?
Chromium exhibits a wide range of possible oxidation states, where the +3 state is the most stable energetically. The +3 and +6 states are the most commonly observed in chromium compounds, whereas the +1, +4 and +5 states are rare.
What is the ion for chromium?
Chromium(III) ion | Cr | ChemSpider.
What is the stable oxidation of chromium?
The most common oxidation states of chromium are +6, +3, and +2. A few stable compounds of the +5, +4, and +1 states, however, are known. In the +6 oxidation state, the most important species formed by chromium are the chromate, CrO 4 2 − , and dichromate, Cr 2 O 7 2 − , ions.
Which is more stable V or CR?
Chemical stability is a thermodynamic phenomenon, and is not indicative of chemical reactivity, which is kinetic in nature. ... However, Cr can attain the higher oxidation state, at which point it becomes more reactive as Cr+5 and Cr+6 , forming the +VI and +VII oxidation states, respectively.
Why is the highest oxidation state of chromium 6+?
Maximum oxidation state of chromium is +6. It is obtained when five 3d electrons and one 4s electron are removed. Thus, when all the valence electrons of chromium are lost , the maximum oxidation state of +6 is obtained.
Why is cu2+ more stable than Cu+?
Stability depends on the hydration energy (enthalpy) of the ions when they bond to the water molecules. The Cu 2 + ion has a greater charge density than Cu+ ion and thus forms much stronger bonds releasing more energy.
Why is CR3+ more stable than CR2 +?
Cr3+is more stable in aqueous solution due to higher hydration energy which is due to smaller size and higher charge.
Which is smaller Cr3+ or CR?
Cr is larger than Cr3+ and Se is larger than Se2-. ... Cr is larger than Cr3+ and Se2- is larger than Se.
What are 5 uses of chromium?
The Uses of Chromium in the Chemical Industry
It is mainly used in electroplating, tanning, printing, and dyeing, medicine, fuel, catalysts, oxidants, matches, and metal corrosion inhibitors . At the same time, metallic chromium has become one of the most important electroplated metals.
What is the most common charge for the zinc ion?
Zinc most commonly forms positively charged cations with a charge of +2 . Zinc will rarely form ions with a +1 charge but it will never form ions with a negative charge.
Is chromium toxic to humans?
Trivalent chromium is an essential trace element in humans and in animals. Chromium as pure metal has no adverse effect. Little toxic effect is attributed to trivalent chromium when present in very large quantities. Both acute and chronic toxicity of chromium are mainly caused by hexavalent compounds.
Which oxidation state of chromium is most stable?
Oxidation States of Chromium
Chromium exhibits a wide range of possible oxidation states, where the +3 state is the most stable energetically. The +3 and +6 states are the most commonly observed in chromium compounds, whereas the +1, +4 and +5 states are rare.
Which oxidation state of chromium is most easily reduced?
Chromium in an oxidation state of +3
The most stable oxidation state of chromium in compounds is +3.
Why is nobelium the only Actinoid with two oxidation states?
After losing 2 electrons No forms No 2 + ion , which is stable due to completely filled 5f-orbitals. ... Such extra stability due to completely filled orbital is not acquired by any other actinoid in their +2 oxidation state. Hence, nobelium is the only actinoid with a +2 oxidation state.
