1. What is VSEPR Theory?

VSEPR (Valence Shell Electron Pair Repulsion) theory predicts the geometry of individual molecules based on the repulsion between electron pairs in the valence shell of the central atom. The steric number determines the molecular geometry.

2. How Does the Calculator Work?

The calculator determines molecular geometry based on steric number:

Where:

• Steric Number 1-2 → Linear geometry
• Steric Number 3 → Trigonal Planar geometry
• Steric Number 4 → Tetrahedral geometry
• Steric Number 5 → Trigonal Bipyramidal geometry
• Steric Number 6 → Octahedral geometry

Explanation: The steric number represents the number of electron domains (bonding pairs + lone pairs) around the central atom, which determines the molecular geometry due to electron pair repulsion.

3. Importance of Molecular Geometry

Details: Molecular geometry determines physical and chemical properties including polarity, reactivity, color, magnetism, and biological activity. Accurate geometry prediction is essential for understanding molecular behavior.

4. Using the Calculator

Tips: Enter the steric number (1-6) which represents the total number of electron domains around the central atom (bonding pairs + lone pairs).

5. Frequently Asked Questions (FAQ)

Q1: What is steric number?
A: Steric number is the sum of the number of atoms bonded to the central atom plus the number of lone pairs on the central atom.

Q2: How do I calculate steric number?
A: Count the number of atoms bonded to the central atom and add the number of lone electron pairs on the central atom.

Q3: What's the difference between electron geometry and molecular geometry?
A: Electron geometry includes all electron domains (bonding and lone pairs), while molecular geometry describes the arrangement of only the atoms (ignoring lone pairs).

Q4: Are there exceptions to VSEPR theory?
A: Yes, some molecules with unusual electronic configurations or transition metal complexes may not follow standard VSEPR predictions.

Q5: Can VSEPR predict bond angles accurately?
A: VSEPR provides approximate bond angles, but actual angles may vary due to differences in repulsion strength between bonding pairs and lone pairs.