18 May '08 18:11>
magnet attracts only iron and nikle between 109 natural elements. Why it is so, I mean why it does not attracts the other matels. Have any one of you any idea about it?
Originally posted by MattPwould you plaes tell me some more details about it or tell me some link to have more information on it.
Actually, many materials are magnetic. Ferromagnetic materials, such iron and nickel, are the materials most people associate with having magnetic properties. In addition, Cobalt is another fairly common ferromagnetic material. However, many rare-earth metals and their compounds are ferromagnetic.
As well as ferromagnetism there are two other main kind ...[text shortened]... erconductors are "perfect diamagnets", in so far as they have a magnetic susecptibility of -1.
Originally posted by PinkFloydIron is approximately at the most stable atomic number. Atomic numbers higher than Iron's will tend to break apart; atomic numbers lower will tend to fuse. Why? I don't know.
When I see "Why only iron?" I think of aries I've seen on the Science Channel. It seems that stars turn Hydrogen into Helium by fusion. Got that. Then when supply gets low, it can produce some of the other elements--Li, Be,... before it finally explodes. But there's something about iron--is it that a nova doesn't produce any element higher on the periodic chart than iron?
Originally posted by AThousandYoungBecause the energy per nucleon is lower than any other element.
Iron is approximately at the most stable atomic number. Atomic numbers higher than Iron's will tend to break apart; atomic numbers lower will tend to fuse. Why? I don't know.
Originally posted by quick chaserWasn't it something to do with the number of electrons in the outer shell of the atom? The first shell has two, the second has 8, the third 18, fourth 32 etc. When the shells have their complete number of electrons they are stable. The outer shell of the iron atom has only two electrons (the same goes for nikkel and cobalt) which are loosely bound to the core so they run off and play if there's something of magnetic interest going on on the other side of the field.. or something. This is only what I remember. Please correct me if I am wrong.
magnet attracts only iron and nikle between 109 natural elements. Why it is so, I mean why it does not attracts the other matels. Have any one of you any idea about it?
Originally posted by FabianFnasIn other words, it's star poop.
Because the energy per nucleon is lower than any other element.
With a atomic number higher than iron, you can get energy out of the nucleus by splitting it. Most effective is uranium as we have in nuclear plants. (Fission.)
With a atomic number lower than iron, you can get energy out of the nucleus by fusing them together. Most effective is hydrogen. ...[text shortened]... is. (Fusion.)
With iron you cannot get out any more energy, neither by splitting nor fusing it.
Originally posted by FabianFnasThanks for the explanation.
Because the energy per nucleon is lower than any other element.
With a atomic number higher than iron, you can get energy out of the nucleus by splitting it. Most effective is uranium as we have in nuclear plants. (Fission.)
With a atomic number lower than iron, you can get energy out of the nucleus by fusing them together. Most effective is hydrogen. ...[text shortened]... is. (Fusion.)
With iron you cannot get out any more energy, neither by splitting nor fusing it.
Originally posted by thymeThat stuff about electrons in the outermost shell rings a bell. Thank you.
Wasn't it something to do with the number of electrons in the outer shell of the atom? The first shell has two, the second has 8, the third 18, fourth 32 etc. When the shells have their complete number of electrons they are stable. The outer shell of the iron atom has only two electrons (the same goes for nikkel and cobalt) which are loosely bound to the core ...[text shortened]... de of the field.. or something. This is only what I remember. Please correct me if I am wrong.
Originally posted by FabianFnasThat's not really much of a "why". I already pointed out that Fe's more stable than higher and lower mass elements.
Because the energy per nucleon is lower than any other element.
With a atomic number higher than iron, you can get energy out of the nucleus by splitting it. Most effective is uranium as we have in nuclear plants. (Fission.)
With a atomic number lower than iron, you can get energy out of the nucleus by fusing them together. Most effective is hydrogen. ...[text shortened]... is. (Fusion.)
With iron you cannot get out any more energy, neither by splitting nor fusing it.
Originally posted by AThousandYoungWell, that's was the "why" answer, part 1.
That's not really much of a "why". I already pointed out that Fe's more stable than higher and lower mass elements.
I looked up the answer for bigger elements. The nuclear force is short ranged. If the nucleus gets bigger than iron, the nuclear force can't hold the pieces together well due to the distances involved.
Originally posted by FabianFnasI thought Part one was good. 🙂
Well, that's was the "why" answer, part 1.
The part 2 involves the arrangements of the neutrons and protons inside the nuclei. How they interact with eachother with the aid of the strong and weak forses within the nucleus.
It is easy understood by non scientific (but interested) people why the energy per nucleon differ from one atom from another, th ...[text shortened]... . And the answer is, at the atomic number 26, iron.
Would you like an answer, part three?