Chapter 2, Section 2: Chemical Bonds

What is an Ionic Compound? How does it differ from a Molecule?

An Ionic Compound is formed when atoms form an Ionic Bond. A Molecule can only be formed by a Covalent Bond. (ask Dr. Jarvis)

What 2 things are required for a Hydrogen Bond?

1. A Hydrogen atom covalently bonded to an electronegative atom (such as N, F, O) 2. Another electronegative atom to bond with

List 4 important properties of Hydrogen bonds

1. Are weak individually, but strong collectively 2. Cannot form molecules 3. Can change a molecule's shape and position 4. Are responsible for water's unique properties

List three things to remember when drawing or interpreting Linear Structural Diagrams

1. Bonding Rule (how many bonds an atom needs to fill its valence shell. 2. Carbon goes on Ends and Bends 3. Carbon needs Hydrogen to be HAPPY!

Which form of chemical bonding is the strongest?

Covalent

Which types of chemical bonds are formed between atoms of the same molecule?

Covalent (ask Dr. Jarvis)

List the types of Chemical Bonds from strongest weakest

Covalent, Ionic, Hydrogen

Describe the role of electrons in Chemical Bonding

Electrons are what attracts certain atoms to each other, whether to share or to donate/receive. The number of Valence Electrons in an atom determines what other atoms it will bond with.

True or False: Molecules can be formed by Ionic Bonding

False. Molecules are only formed by Covalent Bonds. Ionic Bonds form (ask Dr. Jarvis)

True or False: an atom's electronegativity increases as you go up and to the left on the periodic table

False: An atom's electronegativity increases as you go up and to the RIGHT on the periodic table

Which types of chemical bonds are formed between two separate molecules?

Hydrogen (ask Dr. Jarvis)

How is a Covalent Bond different than an Ionic Bond?

In a Covalent Bond, electrons are shared between atoms. In an Ionic Bond, electrons transfer from one atom to the other, resulting in 2 charged atoms (ions) which are attracted to each other.

Which form(s) of Chemical Bonding is/are reversible?

Ionic and Hydrogen

Why is Hydrogen bonding so important?

It affects the structure of DNA and complex proteins and it gives water its unique characteristics.

Which atoms are most electromagnetic?

Nitrogen, Oxygen, Fluorine

Define hydrogen bonding in simple terms

The attraction between a partially positive Hydrogen atom and a partially negative Oxygen, Nitrogen, or Fluorine atom

Describe the effect of the electronegativity of a molecule's atoms on its shared electrons

The greater the difference in the electronegativity of the atoms in a molecule, the less equally the electron is shared.

Describe Ionic Bonding

When one atom gives up an electron to another atom, they both become charged (one positive, one negative). They are then attracted to each other, resulting in an Ionic Bond.