为什么水银是唯一一种液态金属？
As protons or heavy nuclei, such as gold, are accelerated to nearly the speed of light, the quarks and gluons inside flatten into a pancakelike structure, a relativistic effect called Lorentz contraction. due to thsi effect, the 6s2 track is in a steady state. as long as it cannot get enough energy, strong key cannot form between the mercury atoms. the atoms in Hg2 are connected just by van der Waals force. so it' in liquid state under normal temperature.
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