Molecular Theory
Definitions
Bonds
Forces
Molecules
100

What does the acronym VSEPR stand for?

Valence Shell Electron Pair Repulsion  

100

What are the 2 main characteristics of VSEPR theory?

Bonded and non-bonded domains around a central atom.

100

Name the three types of Intramolecular Bonds we have studied.

Ionic, Covalent, Metallic

100

What are intermolecular forces?

Forces that cause molecules to join with other molecules.
100

CO2 is linear. SO2 is NOT linear. Why?

CO2 has no non-bonded domains while SO2 has one non-bonded domain.

200
What does VSEPR theory explain?

molecular shapes

200

What is the electron sea?

The delocalized electrons in a metallic bond.

200

What 4 atoms take place in Hydrogen Bonds?

Hydrogen, Nitrogen, Oxygen, Flourine

200
What are intramolecular forces?

Forces that cause atoms to join with other atoms.

200

Look at the Lewis structure of NH3. What is the EDG and the MG?

EDG = tetrahedral, MG = trigonal pyramidal

300

What is a non-bonded domain?

A pair of electrons around the central atom that are not connected to another atom.

300

What is a dipole?

A molecule with two poles...one positive and one negative.
300

What is the same about Covalent and Metallic bonds?

They share electrons.

300

What are the weakest of all bonding forces?

Londoner Disperson forces: i.e. temporary dipole attractions

300

CH4 has 4 bonded domains on the central atom. Name the EDG and MG.

tetrahedral, tetrahedral

400

What determines the shape of a molecule?

The combination of bonded and non-bonded electron pairs around the central atom.

400

What is an electrostatic attraction?

An attraction based on positive and negative charges.
400

What makes metallic bonds unique?

The electrons are delocalized and move freely through overlapping orbitals forming the electron sea.

400

What are Van der Waals forces?

Weaker electrostatic attractions that join molecules together.

400

Consider the Lewis structure of SbF5. Name the Bond Type Pattern, EDG, and MG.

AB5, trigonal bipyramidal, trigonal bipyramidal

500

How does a non-bonded electron pair affect the molecule?

It exerts more force against the neighboring bonds and "bends" the angle.

500

What are the circumstances of a dipole?

They can be be permanent (based on the structure of the molecule) or temporary (formed when coming into contact with other poles). 

500

What does AB3E mean?

3 bonded domains and one non-bonded domain around a central atom.

500

Name the 3 types of electrostatic attractions of Van der Waals.

1) two permanent dipoles 2) one permanent and one temporary dipole 3) two temporary dipoles

500

Consider H3O+. What does the plus mean? Name the Bond Type, EDG, MG.

The molecule has lost an electron and has a net positive charge. AB3E, tetrahedral, trigonal pyramidal.