Molecules, Compounds, and Chemical Equations

Atoms and Molecules Everything in the universe is made up of matter, and matter is composed of a combination of elements. An atom is the smallest unit of …

A chemical formula presents information about the proportions of atoms constituting a particular chemical compound or molecule, mainly using symbols of …

Physical models representing molecular architectures of chemical compounds play essential roles in understanding chemistry. The use of molecular models …

Pure substances consist of only one type of matter. A pure substance can be an element or a compound. An element consists of only one type of atom, while …

An element composed of atoms that readily lose electrons (a metal) can react with an element composed of atoms that readily gain electrons (a nonmetal) to …

Molecular compounds or covalent compounds result when atoms share electrons to form covalent bonds. Since there is no electron transfer, molecular …

All living things are formed mostly of carbon compounds called organic compounds. The category of organic compounds includes both natural and synthetic …

Formula Mass of Covalent Compounds Chemical formulas represent the elemental makeup of substances. For covalent compounds, the formula represents the …

The elemental makeup of a compound defines its chemical identity, and chemical formulas are the most concise way of representing this elemental makeup. …

Chemical equations represent the identities and relative quantities of substances involved in a chemical reaction. The substances undergoing reaction are …