When carbon compounds react with themselves to form a larger molecule the process is called polymerization. Specifically addition polymerization. sometimes molecules containing containing carbon to carbon double bonds can join together to form longer chains. The double bond is broken and the electrons in it join to neighboring molecules.
Number of neutrons = Atomic mass - Atomic number (number of protons)
Hope that helps!
Condensation releases water
Contractions of the skeletal muscles
As it puts pressure and moves the blood along