Mafunso Okhudza Kapangidwe ka Atomu ndi Periodic Table of Elements
Pendauluan
Kapangidwe ka atomu ndi tebulo la zinthu zozungulira ndi mfundo zazikulu mu chemistry zomwe zimapangitsa kuti pakhale kumvetsetsa kwa makhalidwe ndi machitidwe a zinthu zosiyanasiyana. M'nkhaniyi, tikambirana zitsanzo za mavuto okhudzana ndi kapangidwe ka atomu ndi tebulo la zinthu zozungulira, komanso kukambirana mwatsatanetsatane.
Kapangidwe ka Atomu
Funso la Chitsanzo 1: Kusintha kwa Electron
Funso: Dziwani kasinthidwe ka elekitironi ka atomu ya Calcium (Ca) yomwe ili ndi nambala ya atomu 20.
Kukambirana:
Calcium ili ndi nambala ya atomiki ya 20, kutanthauza kuti ili ndi ma elekitironi 20. Kuti tidziwe momwe ma elekitironi ake alili, tiyenera kugawa ma elekitironiwo motsatira mfundo ya Aufbau, yomwe imadzaza ma orbitals kuyambira pamlingo wotsika kwambiri wa mphamvu mpaka pamlingo wapamwamba kwambiri wa mphamvu.
1. 1s^2 (ma elekitironi awiri)
2. 2s^2 (ma elekitironi awiri)
3. 2p^6 (ma elekitironi 6)
4. 3s^2 (ma elekitironi awiri)
5. 3p^6 (ma elekitironi 6)
6. 4s^2 (ma elekitironi awiri)
Kotero, kasinthidwe ka electron ka Calcium (Ca) ndi 1s^2 2s^2 2p^6 3s^2 3p^6 4s^2.
Chitsanzo Funso 2: Manambala a Quantum
Funso: Dziwani mtengo wa quantum number wa elekitironi yomaliza mu atomu ya okosijeni (O) yomwe ili ndi atomu nambala 8.
Kukambirana:
Mpweya uli ndi nambala 8 ya atomiki, kotero kasinthidwe ka ma elekitironi ake ndi:
1s^2 2s^2 2p^4
Electron yomaliza mu mpweya ili mu 2p orbital. Tiyenera kudziwa nambala ya quantum ya electron iyi:
- Nambala yayikulu ya quantum (n): 2 (chifukwa ili mu chipolopolo chachiwiri)
– Azimuthal quantum number (l): 1 (chifukwa cha p orbital)
– Nambala ya quantum ya maginito (m_l): -1, 0, +1 (p orbit ikhoza kukhala ndi njira zitatu)
- Nambala ya quantum ya spin (m_s): +1/2 kapena -1/2 (ma electron akhoza kukhala ndi njira ziwiri zozungulira)
Pa elekitironi yomaliza mu 2p^4, ma elekitironi amadzazidwa motsatira lamulo la Hund, kotero adzakhala m'modzi mwa ma direction a m_l. Mwachitsanzo, pa ma direction a m_l = 0, manambala a quantum ndi awa:
– n = 2
– l = 1
– m_l = 0
– m_s = +1/2 kapena -1/2 (kutengera kuzungulira kwa ma elekitironi)
Gome la Zinthu Zozungulira
Chitsanzo Funso 3: Katundu wa Zinthu Nthawi ndi Nthawi
Funso: Yerekezerani kukula kwa maatomu a sodium (Na) ndi chlorine (Cl) ndipo perekani chifukwa cha kusiyana kwa kukula.
Kukambirana:
Sodium ndi chlorine zili mu nthawi yomweyo (nthawi 3) koma m'magulu osiyanasiyana:
– Na ali mu gulu loyamba
- Cl ali mu gulu la 17
Kukula kwa atomu (atomu radius) kumachepa kuchokera kumanzere kupita kumanja kudutsa nthawi chifukwa kuwonjezeka kwa mphamvu ya nyukiliya (ma protoni ambiri) kumapangitsa kuti ma elekitironi omwe ali mu chipolopolo chomwecho akokedwe mwamphamvu. Izi zimapangitsa kuti zipolopolo za ma elekitironi zikokedwe pafupi ndi nyukiliyasi.
Motero, kukula kwa atomu ya sodium (Na) ndi kwakukulu kuposa kwa chlorine (Cl) chifukwa Na imapezeka kale munthawiyo. Mwa kuyankhula kwina, ma electron a valence a Na ali ndi mtunda wautali kuposa a Cl, kotero Na ali ndi utali waukulu wa atomu.
Chitsanzo Funso 4: Nambala ya Oxidation
Funso: Dziwani nambala ya okosijeni ya chinthu cha sulfure mu H2SO4.
Kukambirana:
Kuti tidziwe kuchuluka kwa okosijeni wa sulfure mu sulfuric acid (H₂SO₄), timatsatira malamulo odziwira kuchuluka kwa okosijeni:
– Hydrojeni (H) nthawi zambiri imakhala ndi chiwerengero cha okosijeni cha +1.
– Mpweya wa okosijeni (O) nthawi zambiri umakhala ndi nambala ya okosijeni ya -2.
Tiyeni tiyerekeze kuti chiwerengero cha okosijeni cha sulfure mu H₂SO₄ ndi x. Ndiye malinga ndi lamulo, chiwerengero chonse cha manambala okosijeni mu molekyulu imodzi chiyenera kukhala chofanana ndi mphamvu yonse ya molekyulu (yomwe ndi yopanda mbali ndi 0):
Ndalama:
2(H) + 1(S) + 4(O) = 2(+1) + x + 4(-2) = 2 + x – 8 = 0
Kuwerengera x:
2 + x – 8 = 0
x – 6 = 0
x = +6
Kotero, chiwerengero cha okosijeni cha sulfure (S) mu H₂SO₄ ndi +6.
Kusinthika kwa Mankhwala
Chitsanzo Funso 5: Kubwerezabwereza
Funso: N’chifukwa chiyani fluorine (F) imayankha bwino kuposa chlorine (Cl)?
Kukambirana:
Kuyankha kwa ma halojeni (gulu 17) kumachepa ndi kuchuluka kwa ma atomu. Fluorine imagwira ntchito kwambiri kuposa chlorine pazifukwa zingapo zokhudzana ndi kapangidwe ka ma atomu:
1. Mphamvu Yopangira Ioni:
Fluorine ili ndi mphamvu ya ionization yochuluka kuposa chlorine, zomwe zikutanthauza kuti maatomu a fluorine ndi osavuta kukopa ma elekitironi kuchokera ku maatomu ena.
2. Kugwirizana kwa Electron:
Fluorine ili ndi mphamvu yaikulu kwambiri ya ma elekitironi, zomwe zikutanthauza kuti imakonda kupeza ma elekitironi mosavuta kuposa chlorine.
3. Kukula kwa Atomu:
Fluorine ili ndi atomu yaying'ono kuposa chlorine. Ma electron a valence omwe ali mu fluorine ali pafupi ndi nucleus, kotero kukopa kwa ma electrostatic ku ma electron atsopano kumakhala kwakukulu.
Chifukwa chake, zinthu zitatuzi pamodzi zimawonjezera mphamvu ya fluorine yolumikizana ndi zinthu zina, zomwe zimapangitsa kuti ikhale yogwira ntchito kwambiri kuposa chlorine.
Mapeto
Kumvetsetsa kapangidwe ka atomu ndi tebulo la zinthu za periodic ndikofunikira kwambiri mu chemistry. M'nkhaniyi, takambirana mavuto osiyanasiyana a zitsanzo pamodzi ndi kufotokozera mwatsatanetsatane. Izi zikuphatikizapo ma electron configurations, quantum numbers, periodic properties of elements, oxidation numbers, ndi chemical reactivity. Tikamvetsetsa bwino mfundo izi, titha kumvetsetsa bwino makhalidwe ndi machitidwe a zinthu zosiyanasiyana m'chilengedwe chonse.
