... all kinds of systems like atoms, nuclei, molecules or electrons in solids. The principle energy levels of electrons Shell Principle Quantum Number Period (horizontal row) Maximum Number of Electrons = 2n2 Energy sublevels K 1 1 2 S L 2 2 8 S p M 3 3 - 4 18 S p d N 4 4 - 6 32 S p d f O 5 5 - 7 32 (2n2 = 50) S p d f P 6 6 - 7 18 (2n2 = 72) S p d * Q 7 7 * *Man-Made * Elements S * Kinetic Energy There are three different forms of Kinetic Energy in molecules, as follows:> Translational Energy - This is when single diatomic molecules move at a certain velocity in a straight line.> Rotational Energy - This is when single diatomic molecules can rotate around their centre of gravity.> Vibrational Energy - This is when single diatomic molecules at the end of the bonds can move relative to each other. There are approx. 1012 oscillations per second i.e. the frequency of vibration is 1012 s-1. The above are classified as forms of Kinetic Energy because they are ...

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