Formal Charge and VSEPR

Front

What is Formal Charge?

Back

Formal Charge is a theoretical charge assigned to an atom in a molecule, calculated based on the number of valence electrons, the number of non-bonding electrons, and the number of bonds.

Front

How do you calculate Formal Charge?

Back

Formal Charge = (Valence Electrons) - (Non-bonding Electrons) - 0.5*(Bonding Electrons)

Front

What is the significance of Formal Charge in molecular structures?

Back

Formal Charge helps in determining the most stable Lewis structure for a molecule by minimizing the charge on atoms.

Front

What is VSEPR theory?

Back

VSEPR (Valence Shell Electron Pair Repulsion) theory is a model used to predict the geometry of individual molecules based on the repulsion between electron pairs in the valence shell.

Front

What determines the molecular shape according to VSEPR theory?

Back

The molecular shape is determined by the number of bonded atoms and lone pairs of electrons around the central atom.

Front

What is the molecular shape of a molecule with 4 bonded atoms and no lone pairs?

Back

Tetrahedral.

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What is the molecular shape of a molecule with 3 bonded atoms and 1 lone pair?

Back

Trigonal pyramidal.

Front

What is the molecular shape of a molecule with 2 bonded atoms and 2 lone pairs?

Back

Bent.

Front

What is the molecular shape of a molecule with 5 bonded atoms and no lone pairs?

Back

Trigonal bipyramidal.

Front

What is the molecular shape of a molecule with 3 bonded atoms and 2 lone pairs?

Back

T-Shape.