- #1
Cheman
- 235
- 1
Outer shells and reactions...
We say that atoms react in order to gain full outer shells - but why do they do this? Let's take water as an example - oxygen is very electronegative, so much so that when an oxygen atom collides with a hydrogen atom the outer electron of the hydrogen starts to orbit the oxygen some of the time as well, leading to a covalent bond. In fact, oxygen is so electron negative that the electron will spend more time around the oxygen , leading to the polarity of water. The oxygen with do this twice until it gains a full outer shell of 8 - but the it stops. Why does it stop forming bondsonce its outer shell is formed? Surely its ability to attract electrons won't be reduced that much by gaining just 2 electrons?
Thanks in advance. :-)
We say that atoms react in order to gain full outer shells - but why do they do this? Let's take water as an example - oxygen is very electronegative, so much so that when an oxygen atom collides with a hydrogen atom the outer electron of the hydrogen starts to orbit the oxygen some of the time as well, leading to a covalent bond. In fact, oxygen is so electron negative that the electron will spend more time around the oxygen , leading to the polarity of water. The oxygen with do this twice until it gains a full outer shell of 8 - but the it stops. Why does it stop forming bondsonce its outer shell is formed? Surely its ability to attract electrons won't be reduced that much by gaining just 2 electrons?
Thanks in advance. :-)