Chemical Bonding & Electronic Dot Structure -- by Ria Park

Chemical Bonds

Chemical Bonds 

• are formed when the electrons of one atom are attracted by the nucleus if another atom.
• are formed with various degrees of sharing of electrons between two atoms
• COVALENT BOND is formed when the electrons are shared equally between two atoms
• When the electrons of one atom are given away completely to another atom, both a positively charged ion and a negatively charged ion are formed
• The force holding the two ions together is called an IONIC BONDS

Covalent Bond

Ionic Bond

Lewis Structure

• represents valance electrons.
• uses dots to represent electrons, focuses on an atom's valence electrons only.
• The electrons that are in pairs are Lone pairs or Nonbonding electrons.
• These are not used to bond since the orbital they are in already has its full complement if electrons.
• The unpaired electrons are Bonding electrons. They are capable of making one single covalent bond.
• An atom needs to have 2 bonding electrons when we make a double covalent bond.
• To make a triple covalent bond, an atom needs 3 bonding electrons.

Now single covalent bond is forme

Double Bond

Triple Bond

Example of Lewis Structure