Dot Structure of chromium trioxide CrO3

Lewis Electron Dot Structure of chromium trioxide CrO3

Lewis Electron Dot Structure of

Chromium Trioxide CrO3

A simple procedure for writing Lewis electron dot structures is given in a previous article entitled “Lewis Structures and the Octet Rule”. Several worked examples relevant to this procedure were given in previous posts please see the Sitemap - Table of Contents (Lewis Electron Dot Structures).

Another example  for writing Lewis structures following the above procedure is given below.

Let us consider the case of the Lewis electron dot structures of chromium trioxide CrO3. Chromium is an essential nutrient required for normal sugar and fat metabolism and works primarily by potentiating the action of insulin. It is included in several dietary supplements and vitamins. The chemical formula is CrO3 .

 

Step 1: Connect the atoms with single bonds.

 Fig I.1: The CrO3 atoms connected with single bonds

Step 2: Calculate the # of electrons in π bonds (multiple bonds) using  formula (1) in the article entitled “Lewis Structures and the Octet Rule”. 

Where n in this case is 4. Where V = (6 + 6 + 6 + 6 ) = 24 , V is the number of valence electrons of the molecule. Therefore, P = 6n + 2 – V = 6 * 4 + 2 – 24 = 2

So, there is one double bond in the molecule.

Step 3 & 4: The Lewis resonance structures of chromium trioxide CrO3 are as follows:

Fig. I.2: Lewis electron dot structures of CrO3

 


 

Relevant Posts - Relevant Videos

Lewis Structures|Octet Rule: A Simple Method to write Lewis Structures

Lewis Electron Dot Structure of Chromic Acid H2CrO4

 


 

References

  1. G.N. Lewis, J.A.C.S, 38, 762-785, (1916)
  2. E. C. McGoran, J. Chem. Educ., 68, 19-23 (1991)
  3. A.B.P. Lever, J. Chem. Educ., 49, 819-821, (1972)

 

Key Terms

resonance structures of chromium trioxide CrO3, Lewis electron structures of chromium trioxide , chemical formula of chromium trioxide cro3, simple procedure for drawing Lewis structures of chromium trioxide,

 

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