Stability in Bonding 18.1

Stability in Bonding Compound – substance made of the combined atoms of two or more elements.

Chemical Formula tells what elements a compound contains and the exact number of the atoms of those elements C2H5OH

Some Common Compounds Vinegar Acetic acid HC2H3O2 Sand Silicon dioxide SiO2 Stomach acid Hydrochloric acid HCl Cane sugar Sucrose C12O22O11 Lime Calcium oxide CaO Laughing Gas Dinitrogen oxide N2O

2H2O SO42- Superscript represents the oxidation # or how many electrons have been gained or lost Coefficient represents the # of units of each substance Subscript represents the # of atoms in a molecule of a particular element

Atoms form compounds to become chemically stable Atoms form compounds to become chemically stable. An atom is chemically stable when the outer energy level is complete or full.

Energy Levels and Other Elements Hydrogen contains one electron in its lone energy level. It is more stable when it is part of a compound.

Energy Levels and Other Elements When you look at the elements in groups 13 through 17, you see that each of them falls short of having a stable energy level.

Chemical bond – force that holds together the atoms in a substance.