VSEPR Model

What does VSEPR stand for?

• Valence Shell Electron Pair Repulsion

• Valence Shell Electron Pair Reaction

• Valence Shell Electron Pair Rotation

• Valence Shell Electron Pair Reduction

Who were the authors of the article that first introduced the VSEPR model?

• Linnett and Hargittai

• Lewis and Bartell

• Sidgwick and Powell

• Ron Nyholm and R.J. Gillespie

In what year was the VSEPR model first introduced?

• 1956

• 1940

• 1963

• 1957

Which model was developed to supplement the VSEPR model?

• LCP model

• Crystal field theory

• Double quartet model

• POS model

What is the main idea behind VSEPR theory?

• Electrons and nuclei attract each other.

• Electron pairs repel each other to maximize the distance between them.

• Electrons move in predictable orbits.

• Bonding pairs of electrons are the most stable.

Which molecular geometry has four bonding pairs and no lone pairs of electrons?

• Linear

• Trigonal planar

• Tetrahedral

• Trigonal pyramidal

What is the angle between the bonding pairs in a tetrahedral molecule?

• 90°

• 109.5°

• 120°

• 180°

What molecular geometry does a molecule have if it has three bonding pairs and one lone pair of electrons?

• Linear

• Trigonal planar

• Tetrahedral

• Trigonal pyramidal

In a trigonal pyramidal molecule, how many bonding pairs and lone pairs are there?

• 3 bonding pairs, 1 lone pair

• 2 bonding pairs, 2 lone pairs

• 4 bonding pairs, 0 lone pairs

• 3 bonding pairs, 0 lone pairs

Which of the following is NOT a factor that VSEPR theory considers to predict the shape of a molecule?

• The number of lone pairs on the central atom

• The number of bonding pairs on the central atom

• The weight of the atoms in the molecule

• The repulsion between electron pairs