take out your interactive notebook and set up an in, out through on your next two open pages
TRANSCRIPT
Ionic Bonding
• Atoms don’t have an electric charge. They are neutral because the number of positive charges (protons) is always equal to the number of negative charges (electrons)
Types of Chemical Bonds
There are four types of chemical bonds:
1. Ionic Bonds
2. Covalent Bonds
3. Metallic Bonds
4. Hydrogen Bonds
We will study ionic and covalent bonding.
Ionic Bondingoccurs when electron(s) are transferred
from one atom to another. (Metals bonding with Nonmetals)
Li F Be sure to draw!
Ionic Bonding
• When electrons are lost or gained the atom becomes an ion (an atom with a charge).
• Negatively charged ions are attracted to positively charged ions like the opposite poles of a magnet.
Li+ F-
Cation Anion
Ionic Bonding
• Here is what happens during the reaction between Sodium (Na) and Chlorine (Cl).
• When Sodium loses an electron it has an overall positive charge. This is called a Cation.
• When Chlorine gains an electron it has an overall negative charge and is called an Anion
In an IONIC bond,electrons are lost or gained,resulting in the formation of IONS
in ionic compounds.
FK
Out Activity Ionic Bonding
• Draw the Electron Dot Diagram for Potassium and Iodine.
• Show how these two will bond in an Ionic Bond.
• Be sure to use arrows and charge symbols.
Sowhatarecovalentbonds?
Continue using the Cornell notes you started with Ionic Bonding. Make a new title called “Covalent Bonding” in the through section.
In covalent bonding,atoms still want to achievea noble gas configuration(the octet rule).
But rather than losing or gainingelectrons,atoms now share an electron pair.
In covalent bonding,atoms still want to achievea noble gas configuration(the octet rule).
But rather than losing or gainingelectrons,atoms now share an electron pair.
The shared electron pairis called a bonding pair
ClClNeither atom will give up an electron –chlorine is highly electronegative.
What’s the solution – what can theydo to achieve an octet?
Cl Cl
circle the electrons foreach atom that completestheir octets
The octet is achieved byeach atom sharing theelectron pair in the middle
Cl Cl
circle the electrons foreach atom that completestheir octets
The octet is achieved byeach atom sharing theelectron pair in the middle
Cl Cl
circle the electrons foreach atom that completestheir octets
Single bonds are abbreviatedwith a dash
Cl Cl
circle the electrons foreach atom that completestheir octets
This is the chlorine molecule,
Cl2