دیکشنری تخصصی مهندسی نفت - نسخه آنلاین

n pi: hydrocarbons that have a straight chain of carbon atoms. Compare aromatic hydrocarbons.

straight or branched chain hydrocarbons with single bonded carbon atoms. Describes most oils.

n: a compound derived from an alkane by removing one hydrogen atom.

radioactive decay process where the loss of an alpha particle from the nucleus lowers the atomic number by two and the atomic mass by four.

n: one of the extremely small particles of an atom that is ejected from a radioactive substance (such as radium or uranium) as it disintegrates. Alpha particles have a positive charge.

ammonia based materials (NH3),in which one of more of the hydrogen atoms are replaced by hydrocarbons.

n: the smallest quantity of an element capable of either entering into a chemical combination or existing alone.

n: a number that expresses the number of protons and an equal number of electrons in each atom of an element.

n: a number that approximates the number of protons plus the number of neutrons in an atom;it expresses the relative weights of atoms.

v: to spray a liquid through a restricted opening, causing it to break into tiny droplets and mix thoroughly with the surrounding air.