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Why crystal lattices formed by noble metal atoms have vey low melting point?
DEAR SACHIN ,
First of all , how to compare the melting points of solid ? As you know , Solids have cyrstal structures with atoms bonded to each other via some kind of bondings , which may be ionic , covalent , vander waal forces etc. The strength of this bonding is what determines the melting point of the solid , i.e the intra-molecular forces operating inside the solid.
Now , in case of lattice made up of noble atoms , the inta-molecular forces operating are weak vander waal forces which are easier to break with small amount of heat applied. so, melting point is quite low as compared with ionoc solids like NaCl.
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