Why is mercury liquid at room temperature?
li z = 3 [he] 2s^1; mp 180°c; d = 0.53 g cm^-1
hg z = 80 [xe] 4f^14 5d^10 6s^2 mp -38.8°c; d = 13.5 g cm^-1
schrödinger wave equation shows ns e⁻s in particular penetrate core e⁻s , have finite probability of being @ nucleus (that hg has nuclear charge of 80+).[1] near nucleus coulombic attraction between nucleus , 6s e⁻s such velocity of 6s e⁻s become comparable speed of light (~0.1c?) , relativity theory gain mass , hence contracted [dirac/einstein]. because of relativistic contraction there little overlap of filled 6s band 6p band in hg necessary strong metallic bonding.
(cf mg z = 12, [ne] 3s^2 mp 650 °c)
[1] http://winter.group.shef.ac.uk/orbitron/...
is water? chemical bonding, van der waals , dipole-dipole force???
Science & Mathematics Chemistry Next
Comments
Post a Comment