Чим відрізняється азот від іона нітриду?


Відповідь 1:

Яка різниця між тим, що існує, і тим, що ні? Азот - елемент. Природний газ азоту існує як діатомічна молекула, N2. Азот можна знайти в сполуках, але не як іон із зарядом -3. Нітриди металів не поділяються на іони у воді. Іон N ^ 3- не існує у водному розчині, як іон хлориду, Cl-. Натомість вони реагують з водою, що виробляє аміак та гідроксид металу (або оксид).

Будь ласка, не плутайте стан окислення елемента в складі з гіпотетичним іонним зарядом. Азоту може бути призначений стан окислення -3, але ви не знайдете азот із цим зарядом у сполуці, а також не знайдете іон N ^ 3- у розчині.

З лужних металів стійкий лише Li3N. Виходячи з різниці електронегативності, зв’язки Li-N мають близько 65% іонного характеру. Лужноземельних нітридів більш багато, а зв’язки мають подібний іонний характер. З групи 3 і вище, нітриди металів мають зв’язки з посиленням ковалентного характеру.


Відповідь 2:

Чим відрізняється велика рогата худоба від омбре?

Це теж не дуже хороше питання?

Nitrogenisthenameofachemicalelement.ItssymbolisN.Itcanoccurinagreatnumberofdifferentformsandcompounds.Itoccursinallproteinsandthereforeinallorganismsandthereforeitschemicalreactionsformanimportantpartofthemetaboliccyclesofalllifeforms.Italsooccursasadiatomicmoleculargasthatformsthemajorityofouratmosphere.ItschemicalformulaisN2toindicatethateachofitsmoleculescontains2nitrogenatoms.Theyareboundverystronglytoeachotherbyatriplecovalentbond.Thebondingissostrongthatthegasisnotparticularlyreactiveandthatyouwillseldomifeverencounterasingleisolatedfreenitrogenatom.Nitrogen is the name of a chemical element. Its symbol is N. It can occur in a great number of different forms and compounds. It occurs in all proteins and therefore in all organisms and therefore its chemical reactions form an important part of the metabolic cycles of all lifeforms. It also occurs as a diatomic molecular gas that forms the majority of our atmosphere. Its chemical formula is N_2 to indicate that each of its molecules contains 2 nitrogen atoms. They are bound very strongly to each other by a triple covalent bond. The bonding is so strong that the gas is not particularly reactive and that you will seldom -if ever- encounter a single isolated free nitrogen atom.

Anitrideionisalargelyhypotheticalnitrogenatomwiththreeadditionalelectrons.ThisisusuallywrittenasN3Isaylargelyhypotheticalbecauseyouwouldalsobeconsiderablychallengedtofindafreesinglenitrideioninnature,eveninsolution.Theydooccuraspartofcertainusuallysolidcompoundsknownasnitrides.Anexamplewouldbemagnesiumnitride[math]Mg3N2[/math],oneofthefewthatcanbeformedbydirectreactionwithdinitrogenfromtheair.Thenitridesofthemetalsofgroup1and2areratherreactiveandreactreadilywithwatertogiveammonia.Buttherearealsonitridesofelementslikegallium(GaN)thatarequitestable.TheyareusedassemiconductorsinLEDse.g.Theirstructureisadiamondlikepolarcovalentnetwork.Eventhoughtheyarecallednitridesandyoucanformallyassignanoxidationnumberof3tothenitrogenatomsinthestructure,itisnotveryhelpfultoseetheseatomsasnitrideionsbecausethestructureisfarfromcompletelyionic.A nitride ion is a -largely hypothetical- nitrogen atom with three additional electrons. This is usually written as N^{3-} I say ‘largely hypothetical’ because you would also be considerably challenged to find a free single nitride ion in nature, even in solution. They do occur as part of certain -usually solid- compounds known as nitrides. An example would be magnesium nitride [math]Mg_3N_2[/math], one of the few that can be formed by direct reaction with dinitrogen from the air. The nitrides of the metals of group 1 and 2 are rather reactive and react readily with water to give ammonia. But there are also nitrides of elements like gallium (GaN) that are quite stable. They are used as semiconductors in LEDs e.g. Their structure is a diamond-like polar covalent network. Even though they are called nitrides and you can formally assign an oxidation number of -3 to the nitrogen atoms in the structure, it is not very helpful to see these atoms as ‘nitride ions’ because the structure is far from completely ionic.


Відповідь 3:

Чим відрізняється велика рогата худоба від омбре?

Це теж не дуже хороше питання?

Nitrogenisthenameofachemicalelement.ItssymbolisN.Itcanoccurinagreatnumberofdifferentformsandcompounds.Itoccursinallproteinsandthereforeinallorganismsandthereforeitschemicalreactionsformanimportantpartofthemetaboliccyclesofalllifeforms.Italsooccursasadiatomicmoleculargasthatformsthemajorityofouratmosphere.ItschemicalformulaisN2toindicatethateachofitsmoleculescontains2nitrogenatoms.Theyareboundverystronglytoeachotherbyatriplecovalentbond.Thebondingissostrongthatthegasisnotparticularlyreactiveandthatyouwillseldomifeverencounterasingleisolatedfreenitrogenatom.Nitrogen is the name of a chemical element. Its symbol is N. It can occur in a great number of different forms and compounds. It occurs in all proteins and therefore in all organisms and therefore its chemical reactions form an important part of the metabolic cycles of all lifeforms. It also occurs as a diatomic molecular gas that forms the majority of our atmosphere. Its chemical formula is N_2 to indicate that each of its molecules contains 2 nitrogen atoms. They are bound very strongly to each other by a triple covalent bond. The bonding is so strong that the gas is not particularly reactive and that you will seldom -if ever- encounter a single isolated free nitrogen atom.

Anitrideionisalargelyhypotheticalnitrogenatomwiththreeadditionalelectrons.ThisisusuallywrittenasN3Isaylargelyhypotheticalbecauseyouwouldalsobeconsiderablychallengedtofindafreesinglenitrideioninnature,eveninsolution.Theydooccuraspartofcertainusuallysolidcompoundsknownasnitrides.Anexamplewouldbemagnesiumnitride[math]Mg3N2[/math],oneofthefewthatcanbeformedbydirectreactionwithdinitrogenfromtheair.Thenitridesofthemetalsofgroup1and2areratherreactiveandreactreadilywithwatertogiveammonia.Buttherearealsonitridesofelementslikegallium(GaN)thatarequitestable.TheyareusedassemiconductorsinLEDse.g.Theirstructureisadiamondlikepolarcovalentnetwork.Eventhoughtheyarecallednitridesandyoucanformallyassignanoxidationnumberof3tothenitrogenatomsinthestructure,itisnotveryhelpfultoseetheseatomsasnitrideionsbecausethestructureisfarfromcompletelyionic.A nitride ion is a -largely hypothetical- nitrogen atom with three additional electrons. This is usually written as N^{3-} I say ‘largely hypothetical’ because you would also be considerably challenged to find a free single nitride ion in nature, even in solution. They do occur as part of certain -usually solid- compounds known as nitrides. An example would be magnesium nitride [math]Mg_3N_2[/math], one of the few that can be formed by direct reaction with dinitrogen from the air. The nitrides of the metals of group 1 and 2 are rather reactive and react readily with water to give ammonia. But there are also nitrides of elements like gallium (GaN) that are quite stable. They are used as semiconductors in LEDs e.g. Their structure is a diamond-like polar covalent network. Even though they are called nitrides and you can formally assign an oxidation number of -3 to the nitrogen atoms in the structure, it is not very helpful to see these atoms as ‘nitride ions’ because the structure is far from completely ionic.