有些问题想请教

Leong13

有些问题想请教 the different between ionic bond,covenlent bond , van der waals ,hydroden bond?

tcgien

BONDING 的力度之强度有关...
去找书吧

van der waals force比ionic bond & covalent bond弱很多

covalent bond是共用电子

AndreKing

ikatan hidrogen 是在 alkohol larut dlm air 的时候有的。。。
ikatan kovalen 会在 molekul atr sebatian kovalen....
ikatan ionik 会在  sebatian ionik.....
daya tarikan van der waals 会在 molekul atr sebatian kovalen......

原帖由 AndreKing 于 18-3-2006 07:21 PM 发表
ikatan hidrogen 是在 alkohol larut dlm air 的时候有的。。。
ikatan kovalen 会在 molekul atr sebatian kovalen....
ikatan ionik 会在  sebatian ionik.....
daya tarikan van der waals 会在 molekul at ...

你所讲的氢键(hydrogen bond)不一定只是酒精溶在水里的时候才形成，就好像水份子的氧原子跟另一个水份子的氢原子就会形成氢键，氨气（NH3)能溶在水里，就是氨气的氮原子和水分子的氧原子形成氢键。

原帖由 Leong13 于 21-2-2005 17:17 发表
有些问题想请教 the different between ionic bond,covenlent bond , van der waals ,hydroden bond?

对不起要用英文。
-ionic bond is a bonding between ionic compound lik NaCl have charge
-covalent bond is bonding that make the covalent compound like CO2
bond together

-van der waals is a force between molecule n molecule not like ionic n
covalent that use 2 form molecule

-hydrogen bond is a special type of van der waals force but form when H
bond with F N O  very strong type of van der waals so have special name

Ionic bond is the force of attraction between an anion and a cation
Covalent bond is the force of attraction between the nucleus of bonded atoms and the shared pair of electrons

Van der Waals 和 H-bond 都是intermolecular bonding
具体的我忘了，不过
Van der Waals is the force of attraction between non-polar molecules
Hydrogen bonding is the force of attraction between hydrogen atom of a molecule with an electronegative atom(with at least 1 lone pair of electron) of another molecule