Which energy transformation pops the corn kernels

Idon't understand is there supposed to be a list or something if there is pm or add in under this message i will do my best to .

In atoms, the electron carries a negative elementary or unit charge; the proton carries a positive charge. the two types of charge are equal and opposite. in an atom of matter, an electrical charge occurs whenever the number of protons in the nucleus differs from the number of electrons surrounding that nucleus.

Answerit is comparative because this experiment is comparing the results of the volume at minimal pressure and then increases it; ; ;