The melting points RbBr is 682^(@)C, while that of NaF is 988^(@). The – InterviewSolution

1.	The melting points RbBr is 682^(@)C, while that of NaF is 988^(@). The principal reason of this fact is :
Answer» The MOLAR mass of NaF is smaller than that of RbBr the bond of RbBr has more COVALENT character than the bond in NaF the difference in electronegativity between Rb and Br is maller the difference between Na and F the intermoleculear DISTANCE, `r_(c)+r_(a)` is GREATER for RbBr than for NaF Answer :D

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