Almost every object you can think of is made of atoms. Atoms are found in the rocks in the dirt. Atoms compose the clouds in the sky. The trees on the hills and the water in the oceans are all formed from atoms.
Atoms also have the ability to come together to form chemical bonds.
The type of bond that they form is called a covalent bond, which means that the Hydrogen and Oxygen molecules share their electrons equally. Table salt is made of Sodium and Chlorine. The Sodium atom gives up one of its electrons. Since electrons have a negative charge this gives Sodium a positive charge. The Chlorine atom aquires this electron and becomes negatively charged.