Stable atoms have as many electrons as they do protons. How do these electrons orient themselves around the nucleus? They fill their electron orbitals by the aufbau principle.: The Aufbau Principle - Using the Aufbau Principle
Useful sheet for discovering/remembering some of the major functional groups, which are found in the field of Organic Chemistry. A functional group is every part of a molecule where a reaction might take place.
We all are made of chemicals and everything around us is made of chemicals. Everything we hear, see, smell, taste, and touch involves chemistry and chemicals all involve intricate series of chemical reactions