Molecular geometry or shape Calculator

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A molecular geometry calculator is an online tool that helps in predicting the molecular geometry or shape of a molecule using the popular AXE method.

The molecular geometry calculator is also called the molecular shape calculator. This calculator is based on the AXE method. It should be noted that molecular geometry is different from electron geometry.

Molecular geometry calculator

 

How to calculate molecular geometry?

The molecular geometry can be calculated using a simple method that is AXE method.

AXE is a simple formula to represent the number of atoms bonded to the central atom in a molecule and the number of lone pairs present on the central atom.

axe method to calculate molecular geometry

After finding the number of lone pairs and bonded atoms attached to the central atom, use the VSEPR chart given below to calculate the molecular geometry or shape of a given molecule.

For instance –

  • If the number of lone pairs (E) on the central atom is 2, and the number of bonded atoms (X) attached to the central atom is 1, then the AXE formula becomes – AXE2So, the molecular geometry or shape for AXE2 according to VSEPR chart will be Linear.
  • If the number of lone pairs (E) on the central atom is 2, and the number of bonded atoms (X) attached to the central atom is also 2, then the AXE formula becomes – AX2E2So, the molecular geometry or shape for AX2E2 according to VSEPR chart will be Bent or V-shaped.

Look at the VSEPR chart given below with all the necessary data.

Bonded atoms (X)Lone pairs (E)Generic formula (AXE)Molecular geometry or shape
20AX2Linear
11AXELinear
30AX3Trigonal planar
21AX2E1Bent or V-shape
12AXE2Linear
   40AX4Tetrahedral
   31AX3ETrigonal pyramidal
  22AX2E2Bent or V-shape
   13AXE3Linear
   50AX5Trigonal bipyramidal
   41AX4E1 Seesaw
     32AX3E2T-shape
23AX2E3Linear
60AX6Octahedral
51AX5E1Square pyramidal
42AX4E2Square planar

Now, the question arises how will you find the number of lone pairs on the central atom of the molecule. For that, the best way to predict the number of lone pairs and bond pairs in the molecule is using a lewis structure.

Take a look at the guide –

Also, check the detailed guide about –

Learn more about AXE notation in detail

FAQ

What is a molecular geometry calculator?

A molecular geometry calculator is an online tool that helps in predicting the molecular geometry or shape of a molecule using the popular AXE method.

molecular geometry calculator

How do you calculate molecular geometry?

The molecular geometry can be calculated using a simple method that is AXE method. AXE is a simple formula to represent the number of atoms bonded to the central atom in a molecule and the number of lone pairs present on the central atom.

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Welcome to Topblogtenz, My name is Vishal Goyal. I am an engineer, chemistry tutor, blogger, and founder of topblogtenz.com. I'm a science geek with a passion for life sciences and chemistry. Being a chemistry tutor and having a degree in Engineering, I know how hard it is to learn by yourself, that is why I created a site where you can find help related to science and chemistry before everyone else.

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