Hydrogen Bonds

The interatomic distance of monovalent atomic contacts are significantly shorter than the value calculated as the sum of the corresponding van der Waals radii when one of the atoms is hydrogen. Because the entire electron shell of hydrogen is appreciably shifted onto the atom to which hydrogen is covalently bound, the shell repulsion between contact partners is small, and the attracting charges can approach each other more closely. Such a short distance approach gives rise to a high attractive Coulomb energy and, therefore, a high dispersion energy.

Sleeping Sanctuary

Sleeping Sanctuary

Salvation For The Sleep Deprived The Ultimate Guide To Sleeping, Napping, Resting And  Restoring Your Energy. Of the many things that we do just instinctively and do not give much  of a thought to, sleep is probably the most prominent one. Most of us sleep only because we have to. We sleep because we cannot stay awake all 24 hours in the day.

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