Explain how intermolecular forces are important in gas chromatography and how they affect retention times.

n has four pairs of electrons in the valence shell, electrons repel one another ,n has 7 protons in its nucleus, and since n has 7 protons, it must fill the second shell, giving it 4 pairs of electrons. the electrons form 3 bonds and 1 lone pair of electrons. each pair of electrons repels the other pairs, so they are equally far apart.

so all of the above

it should have an internal chamber and two thermometers sticking out of the top. the internal chamber will also be closed off from the outside.