Do Now• Write your homework in your agenda.• Update your table of contents:

• Fold and attach the notes to page 101.

• Make a large Venn diagram on page 100. Title one circle “Ionic bonding” and the other circle “Covalent bonding”

• At the bottom of page 100, try to dissect the word “covalent” and explain what it means from its parts.

Page # Title Date100-101 Covalent bonding 01/23/15

Covalent Bonds• A covalent bond is a chemical bond

formed when two atoms share one or more pairs of valence electrons.

• These bonds are weaker than ionic bonds.

• Covalent bonds occur between nonmetals only.

Think of it as…

Molecule• A molecule is another name for a compound that

is held together by covalent bonds.

Double and Triple bonds

Strongest-----------------------------------Weakest Order of bond strength: Triple bond > double bond > single bond

Bonds FYI• Typically the electrons shared in a bond are drawn

as a straight line.• 1 line for each pair of electrons.

Double and Triple bonds

• In a single covalent bond, two electrons are shared between two atoms.

• In a double bond, 4 electrons are shared between two atoms.

• In a triple bond, 6 electrons are shared between two atoms.

• The more bonds between the atoms, the stronger the bond is.

Polar• A molecule that has an unequal sharing of

electrons is called a polar molecule

The more electronegative an atom is, the more it hogs the electrons.

Ionic bonds

Covalent bonds