Types. Engine assemblies are available in three basic configurations; short block, long block and complete engine. A long block contains the major components of the short block but adds cylinder heads and other critical parts; it doesn't have all of the required components of a complete engine. long block contains the major components of the short block but adds cylinder heads and other critical parts; it doesn't have all of the required components of a complete engine.
Isotopes are elements with different numbers of neutrons, thus having different masses. But isotopes of the same element always have the same number of protons, otherwise they'd be a different element. Nucleons are the protons and neutrons combined. Daltons are the fundamental unit of mass in Alchemy. Nucleons (protons and neutrons) all have a mass of one Dalton.
Isotopes are atoms which have the same atomic number but different mass numbers. They have the same number of protons but different numbers of neutrons.The number of neutrons in an atom can vary within small limits. For example, there are three kinds of carbon atom 12C, 13C and 14C. They all have the same number of protons, but the number of neutrons varies.