超一流化学高手、化学专家请进(Periodicity0022)Fluorine,chlorineandbromineareconsecutivehalogensinGroupVII.Determinewhichhalogenhasthehighest:(a)Bollingpoint.(b)Bonddissociationenergy.(c)Electronaffinity.Giveexplana

Question

超一流化学高手、化学专家请进(Periodicity 0022)
Fluorine,chlorine and bromine are consecutive halogens in Group VII.Determine which halogen has the highest :
(a) Bolling point.
(b) Bond dissociation energy.
(c) Electron affinity.
Give explanations ti support your answer.
Thanks.
Give explanations it support your answer

Answer 1

a:bromine,the module of bromine is heavier than the others ,so it has a stronger intermolecular forces
b:F of crouse,the atom nucleus of flurine has the strongest attractive force to other atoms
c:clorine,as is referred above,the atom nucleus of flurine ,chlorine and bromine should have a decreasingly attractive force to its electrons,but in fact the electron affinity of fluorine is less than that of chlorine,the explanation is:the atomic radiu of F is too small,so that electrons around the nucleus has a high density.When the atom of F receive a electron,the original electrons will have a large repulsive force to it which will affect the energy went away in the process of making a bond
原理很简单的,就是E文有点费劲吧...