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elektronska konfiguracija

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Nov-04-17 Povezivanje elekrtonske konfiguracije i principa izgradnje periodnog sistema elemenata
Nov-04-17 Pojašnjenje

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ELEKTRONSKA KONFIGURACIJA

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Danski fizičar Niels Bohr dokazao je da raspored elektrona u atomu nije slučajan, već da se oni mogu nalaziti oko jezgra samo u tačno određenim kvantnim putanjama. Takvo stanje atoma se naziva stacionarno stanje (u kojem atom ne apsorbuje niti emituje energiju).

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Nov 4
Prof. Jelena Tanaskovic Prof. Jelena Tanaskovic (Nov 04 2017 3:08AM) : Borov model atoma more

Koji su nedostaci Borove teorije? Kakva je priroda elektrona (de Brolji)? Objasni dalje usavršavanje talasno-mehaničke teorije o strukturi atoma (Hajzenberg, Šredinger i Dirak).

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Energetski nivoi ili ljuske u kojima se mogu nalaziti elektroni u atomu označavamo brojevima od 1 do 7 ili slovima K, L, M, N, O, P, Q.

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Dovođenjem energije atom prelazi u stanje više energije (pobuđeno stanje). Elektron prelazi iz stanja najmanje energije (najbliže jezgru) u stanje više energije. Apsorbovana energija je jednaka razlici energije elektrona na višem i nižem elektronskom nivou. Povratkom u stacionarno stanje atom emituje energiju jer se vraća s višeg energetskog nivo na niži.

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INSTRUKCIJE IZ KEMIJE - ELEKTRONSKA KONFIGURACIJA, Instrukcije, poduke, repeticije, matematika, kemija, fizika, drugi predmeti, drWavna matura, upis na medicinski fakultet, klasiWno ili putem Skypea, sve Wkole i fakulteti, 095 812 7777

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Najveći broj elektrona u određenoj ljusci je 2n2.

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Prof. Jelena Tanaskovic Prof. Jelena Tanaskovic (Nov 04 2017 3:10AM) : Glavni kvantni broj more

Šta predstavlja glavni kvantni broj?

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Unutar ljuske elektroni se raspoređuju u orbitale koje označavamo slovima s, p, d, f.

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Orbitala – deo prostora u kojem je najveća verovatnoća nalaženja dva elektrona suprotnog spina.

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Prof. Jelena Tanaskovic Prof. Jelena Tanaskovic (Nov 04 2017 3:13AM) : Orbitala more

Prostor oko jezgra atoma, za koji postoji određena verovatnoća da će se naći elektron, naziva se atomska orbitala.

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U svakoj orbitali mogu se nalaziti po dva elektrona suprotnog spina:

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INSTRUKCIJE IZ KEMIJE - ELEKTRONSKA KONFIGURACIJA, Instrukcije, poduke, repeticije, matematika, kemija, fizika, drugi predmeti, dr�avna matura, upis na medicinski fakultet, klasi�no ili putem Skypea, sve �kole i fakulteti, 095 812 7777

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s orbitala popunjena sa 2 elektrona suprotnog spina

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Spin elektrona je svojstvo elektrona, a tumači se kao rotiranje elektrona oko vlastite ose.

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INSTRUKCIJE IZ KEMIJE - ELEKTRONSKA KONFIGURACIJA, Instrukcije, poduke, repeticije, matematika, kemija, fizika, drugi predmeti, dr&avna matura, upis na medicinski fakultet, klasi&no ili putem Skypea, sve &kole i fakulteti, 095 812 7777

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Elektroni su u pojedinom nivou razvrstani u jednu s - orbitalu, tri p - orbitale, pet d - orbitala i sedam f - orbitala.

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Elektronska konfiguracija nam pokazuje broj elektrona u atomu ili jonu i njihov razmještaj po ljuskama i orbitalama.

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Struktura i sve zakonitosti u periodnom sistemu zavise od elektronske konfiguracije atoma elemenata. Svojstva elementa uglavnom zavise od elektronske konfiguracije spoljne ljuske.

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Primer: Elektronska konfiguracija vodonikaka

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INSTRUKCIJE IZ KEMIJE - ELEKTRONSKA KONFIGURACIJA, Instrukcije, poduke, repeticije, matematika, kemija, fizika, drugi predmeti, dravna matura, upis na medicinski fakultet, klasino ili putem Skypea, sve kole i fakulteti, 095 812 7777

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Orbitale se popunjavaju redom od niže prema višoj energiji.

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Istovrsne orbitale se uvijek popunjavaju tako da najveći mogući broj elektrona bude nesparen, jer je tada energija atoma najmanja (Hundovo pravilo) Hundovo pravilo-pri popunjavanju atomskih orbitala iste energije elektroni se razmeštaju u svakoj orbitali po jedan, a potom nastaje njihovo sparivanje.

Hundovo pravilo-pri popunjavanju atomskih orbitala iste energije elektroni se razmeštaju u svakoj orbitali po jedan, a potom nastaje njihovo sparivanje.

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INSTRUKCIJE IZ KEMIJE - ELEKTRONSKA KONFIGURACIJA, Instrukcije, poduke, repeticije, matematika, kemija, fizika, drugi predmeti, dr)avna matura, upis na medicinski fakultet, klasi)no ili putem Skypea, sve )kole i fakulteti, 095 812 7777

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Redosled popunjavanja orbitala (pravilo dijagonala)

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Konfiguracija s osam elektrona u spoljašnjoj ljusci je vrlo stabilna. To je oktetna konfiguracija ili konfiguracija plemenitog gasa. Spoljašnju ljusku nazivamo valentnom ljuskom, a elektrone u njoj valentni elektroni. Oni se mogu aktivno uključiti u hemijsku promenu.

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Redoslijed popunjavanja orbitala: 1s2 2s2 2p6 3s2 3p6 4s2 3d10 4p6 5s2 4d10 5p6 6s2 4f14 5d10 6p6 7s 2 5f14 7p6

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INSTRUKCIJE IZ KEMIJE - ELEKTRONSKA KONFIGURACIJA, Instrukcije, poduke, repeticije, matematika, kemija, fizika, drugi predmeti, dravna matura, upis na medicinski fakultet, klasino ili putem Skypea, sve kole i fakulteti, 095 812 7777

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INSTRUKCIJE IZ KEMIJE - ELEKTRONSKA KONFIGURACIJA, Instrukcije, poduke, repeticije, matematika, kemija, fizika, drugi predmeti, dr&avna matura, upis na medicinski fakultet, klasi&no ili putem Skypea, sve &kole i fakulteti, 095 812 7777

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Elektronska konfiguracija ugljenika, azota, neona i natrijuma

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DMU Timestamp: November 01, 2017 20:56

Added November 04, 2017 at 3:41am by Prof. Tanaskovic
Title: Povezivanje elekrtonske konfiguracije i principa izgradnje periodnog sistema elemenata

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Nov 4
Prof. Jelena Tanaskovic Prof. Jelena Tanaskovic (Nov 04 2017 3:44AM) : Natrijum more

Napisati elektronsku konfiguraciju natrijuma.

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DMU Timestamp: November 01, 2017 20:56

Added November 04, 2017 at 3:52am by Prof. Tanaskovic
Title: Pojašnjenje

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DMU Timestamp: November 01, 2017 20:56

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