Acid

Atoms are the building blocks of all matter that we can touch, affect and be affected by. They each contain varying numbers of protons, electrons and neutrons that make up hundreds of thousands of different elements, molecules and compounds used both by nature and humans. These can range from a simple oxygen molecule (O2) to more complicated compounds such as Methamphetamine, C20H15N. One such molecule is HCN; Hydrogen Cyanide.