✔ 最佳答案
2)depend on the intermolecular force(e.g. hv H-bond----->higher b.p.)
size and mass of elements
functional group in the structure(e.g. -COOH, -OH-------hv functional gp which contain polar bond----->higher b.p.)
surface area of the structure(increase surface area--->increase intermolecular force------>increase b.p.)
3)larger mass--->higher boiling pt
becoz larger mass element contain more electrons---->more electrons----->increase electrostatic attraction--->stronger intermolecular force---->higher b.p.
4)down the group---->more electron shells---->outermost electrons held less tightly by nucleus------->so larger in size
across period------>more protons in mucleus------>strong electrostatic force between protons and outermost electrons------->so smaller in size
2007-07-14 22:23:07 補充：
---------->其實係------>黎ga唔知點解send出時變左樣
2007-07-14 22:25:31 補充：
group 3 的boiling pt 會高過 group 1coz gp 3 hv metallic bond(e.g. Al)
