View
212
Download
0
Category
Tags:
Preview:
Citation preview
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.
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.
Recommended