1 Face value is the money amount the bond will be worth at its maturity, and is also the reference amount the bond issuer uses when calculating interest payments.  Coupon rate is the rate of interest the bond issuer will pay on the face value of the bond, expressed as a percentage.
The modern atomic theory traces back to ancient Greece where philosophers theorized that matter could be divided down until it reached a single, indivisible part. In the 19th century, this concept was brought into mainstream thought as physicists and chemists began to find more evidence for the existence of the atom.
For the unrelated term in mathematical logic, see Atomic model (mathematical logic). This article is about the historical models of the atom. For a history of the study of how atoms combine to form molecules, see History of molecular theory. In chemistry and physics, atomic theory is a scientific theory of the nature of matter, which states that matter is composed of discrete units called atoms.