When a neutral atom or molecule loses or gains an electron, an ion is formed.
2007-11-24 20:58:00
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answer #1
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answered by ag_iitkgp 7
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An ion is formed when an atom or molecule has an imbalance in the electrical charge.
A neutral atom, for example has an equal number of protons and electrons; that's the default state for any given atom, usually. But suppose we put an electrical arc through a gas of neutral atoms? A lot of free electrons are suddenly available, all wanting to find someplace to call home. Some of them are going to buddy up to the local electrons and try to muscle in on their protons.
This is an unstable arrangement, and as soon as the atom can kick out the unwelcome guest, it will do so. But while the atoms have extra electrons, those atoms have a net negative charge. (Electrons are the negatively-charged particles, after all.)
On the other hand, if circumstances draw electrons away, thanks to rubbing two materials together to generate static electricity, for example, then the atoms become positively charged. The protons get lonely and hope a nice electron will come by to hang around and be their friend. Meanwhile, over on the other piece of material, there are a bunch of overcrowded atoms, just waiting to kick out the extras!
And when they get lonely, they mean it. If you've ever touched a doorknob on a winter day and zapped yourself unexpectedly, you'll know what I mean. All those electrons suddenly have a home to go to, and they stampede back toward someplace less crowded.
Ionic bonds are formed, however, when atoms are sharing electrons, much like parents who have joint custody. Sometimes the electron is over at one house (nucleus), sometimes at the other.
Some atoms have innate imbalances in their electron shells, empty spots that--while still leaving the atom neutral--could easily be used to temporarily house an electron, much like a guest room. Other atoms have extra electrons--not out of electrical balance, of course, but more like having multiple kids sharing the same bedroom. It would be nice to give them their own room, but the atom just doesn't have the space.
When two atoms of these types come together, they form an ionic bond--the 'extra' electron shares some space with the 'empty' area of the other atom, but still comes home on a regular basis, thus connecting the two atoms. Stronger ionic bonds are formed when there are multiple 'kids,' if you follow the metaphor--some atoms have really crowded electron shells; others have lots of spare 'rooms.'
Further information--and much more technical--can be found elsewhere:
2007-11-25 04:52:11
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answer #2
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answered by Garon Whited 3
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basically something is called a ion when the no. of electrons is lesser than the no. of protons. Ion is formed when something losses or gains electrons.
When something gains electrons it is called a negative ion because no. of protons is less than the no. of electrons. This is might be bit confusing, easy way to explain this is when u substarct 2-3 the answer is -1. This is wat happens in the case of negative.
On the other hand when something loses electrons it becomes positive ion. i.e. no. of protons is more than the no. of electrons. example : 3-2 in +1.
Ionic bonding is the bonding between a positive ion and neagative ion (the attraction between opposite charges).
For example if you take lithium chloride (Licl). Li (2,1) has 1 electrons in the outershell. and chlorine (2,8,7) has 7 electrons in the outershell. To make lithium stable it loses 1 electron nad becomes positive electron and to make chlorine it gains 1 electron and becomes negative ion. thus the ionic bonding is formed.
Hope this helps
Hope this helps you.
2007-11-25 04:49:50
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answer #3
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answered by barath90 1
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ions are atoms which have lost or gained electrons.
eg
sodium chloride
NaCl
each atom wants to have 8 electrons in their valence shell.
so, Na will lose 1 electron and chlorine will gain 1 electron.
so Na will have 2, 8 and Cl will have 2, 10, 8 in their shells.
remember, they dont SHARE electrons, they GIVE or TAKE electrons
2007-11-25 04:52:16
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answer #4
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answered by lolcuz212 3
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