Chemical Bonds

Chemical bonds are the forces that hold atoms together in compounds. They are formed because atoms are not happy with the number of electrons that they have. Only the noble gases (column 8A) are content with the number of electrons. They have the optimum number of electrons and don't like to form chemical bonds. The desire of atoms to gain or lose electrons to get a noble gas number of electrons is what leads to chemical bonding.

(It is pretty common for chemists to personify the atoms and molecules with which they work! Saying an atom wants another electron is akin to saying a ball wants to roll down a hill. Later, we will examine the energetic and thermodynamic bases of this personification.)

There are three types of chemical bonds:

Later, you will be able to determine just how ionic or covalent a bond will be, but for now, here are some guidelines to follow:

Homework from Chemisty, The Central Science, 10th Ed.

2.39, 2.41, 2.43, 2.45, 2.53, 2.55