AP Chemistry Units 1 and 2 Review

Front

What is the binding energy of an electron in an atom?

Back

The binding energy is the energy required to remove an electron from an atom. It can be calculated by subtracting the kinetic energy of the ejected electron from the energy of the incoming photon.

Front

What is the significance of the sp² hybridization in molecular geometry?

Back

sp² hybridization involves the mixing of one s orbital and two p orbitals, resulting in three equivalent sp² hybrid orbitals that are arranged in a trigonal planar geometry.

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 shape does a molecule with sp² hybrid orbitals adopt?

Back

A molecule with sp² hybrid orbitals adopts a trigonal planar shape.

Front

What is the molecular shape of SF₅ according to VSEPR theory?

Back

The molecular shape of SF₅ is trigonal bipyramidal.

Front

Which elements can exceed the octet rule?

Back

Elements in the third period and beyond, such as phosphorus, sulfur, arsenic, and iodine, can exceed the octet rule in some of their compounds.

Front

What is the formula for calculating binding energy?

Back

Binding Energy = Energy of Photon - Kinetic Energy of Ejected Electron.

Front

What type of substance is K₂SO₄?

Back

K₂SO₄ (potassium sulfate) is a hard, brittle, nonconductor.

Front

What is the electron pair geometry for a molecule with four electron pairs?

Back

The electron pair geometry for a molecule with four electron pairs is tetrahedral.

Front

What is the difference between a conductor and a nonconductor?

Back

A conductor allows the flow of electric current, while a nonconductor (or insulator) does not allow electric current to flow.