For the Focusâ first four model years, a 2.0-liter four-cylinder engine was offered and paired with a five-speed manual or a four-speed automatic transmission. Beginning in 2004, a 2.3-liter four-cylinder was also offered. In 2005, Ford refreshed the Focus shuffling trim and equipment offerings with it.
atomic mass - (chemistry) the mass of an atom of a chemical element expressed in atomic mass units. atomic weight, relative atomic mass. mass - the property of a body that causes it to have weight in a gravitational field. combining weight, eq, equivalent weight, equivalent - the atomic weight of an element that has the same combining capacity as a given weight of another element; the standard is 8 for oxygen.
the total mass of an atom, numerically equivalent to the mass in grams of 1 mole of the atom. (For element with more than one isotope, the atomic mass is the average mass of the naturally occurring isotopes, weighted by their abundance.) Isotope one of the several atomic forms of the element, each with the same number of protons but a different number of neutrons, thus differing in atomic mass.