Tambayoyi Misali Game da Teburin Abubuwa na Lokaci-lokaci
Teburin lokaci, wanda aka fi sani da tsarin lokaci, yana ɗaya daga cikin kayan aikin sinadarai mafi mahimmanci, yana taimaka mana mu fahimci halayen abubuwa da alaƙar da ke tsakaninsu. Cikakken fahimtar teburin lokaci zai iya zama mai matuƙar amfani a fannoni daban-daban na amfani da sinadarai, tun daga nazarin abu zuwa haɗakar abubuwa. Wannan labarin zai samar da misalai da dama na matsaloli da kuma cikakken bayani game da teburin lokaci don zurfafa fahimtarka.
Gabatarwa ga Teburin Abubuwa na Lokaci-lokaci
Dmitri Mendeleev ne ya fara ƙirƙiro teburin abubuwa na lokaci-lokaci a shekarar 1869. Mendeleev ya tsara abubuwan bisa ga yawan tarin atom ɗinsu kuma ya gano tsarin lokaci-lokaci a cikin halayen sinadarai. Tun daga lokacin, an sabunta teburin lokaci-lokaci sau da yawa kuma yanzu an rarraba shi ta hanyar ƙara yawan atom, wanda shine adadin protons a cikin ƙwayar atom.
An raba abubuwan da ke cikin teburin lokaci-lokaci zuwa ƙungiyoyi, ko ginshiƙai a tsaye, da kuma lokaci-lokaci, ko layukan kwance. Ƙungiyoyi yawanci suna nuna abubuwa masu kama da halayen sinadarai, kuma lokaci-lokaci yana nuna ƙaruwa a hankali a cikin waɗannan halayen.
Tambayoyi da Tattaunawa Samfura
Tambaya ta 1: Kayyade Ƙungiyoyi da Lokuta
Tambaya: An ba da wani abu mai lambar atomic 17. Kayyade rukuni da lokacin sinadarin a cikin teburin lokaci-lokaci.
Tattaunawa:
Sinadarin da ke da lambar atomic 17 shine chlorine (Cl). Domin tantance rukuni da tsawon wani abu a cikin teburin periodic, muna buƙatar bincika tsarin electrons ɗinsa.
Tsarin electron na chlorine shine:
\[ \text{1s}^2 2s^2 2p^6 3s^2 3p^5 \]
A cikin jadawalin lokaci-lokaci, ƙananan harsashin s da p a cikin lokaci na 3 sune:
– 3s^2: Electron 2 a cikin ƙaramin harsashi na 3s
– 3p^5: Electrons 5 a cikin ƙaramin harsashi na 3p (jimillar electrons 7 a cikin harsashi na 3)
Saboda haka, chlorine yana cikin lokaci na 3 da rukuni na VIIA (ko 17 bisa ga IUPAC na zamani, saboda an haɗa shi cikin rukunin halogen wanda ke da electrons valence 7).
Amsa:
Chlorine yana cikin rukuni na VIIA (17) da kuma lokaci na 3.
Tambaya ta 2: Sifofin Sinadarai Dangane da Wurin da ke cikin Teburin Lokaci-lokaci
Tambaya: Me yasa sodium (Na) da potassium (K) suke da irin waɗannan halaye na sinadarai?
Tattaunawa:
Dukansu sodium (Na) mai lambar atomic 11, da potassium (K) mai lambar atomic 19, suna cikin rukuni ɗaya a cikin teburin lokaci-lokaci, wato rukunin IA (ko 1 bisa ga tsarin IUPAC), wanda aka sani da ƙarfe alkali.
Tsarin electron na sodium shine:
\[ \text{1s}^2 2s^2 2p^6 3s^1 \]
Tsarin electron na potassium shine:
\[ \text{1s}^2 2s^2 2p^6 3s^2 3p^6 4s^1 \]
Dukansu sinadaran suna da electron ɗaya a cikin mafi girman s-subshell, wanda ke sa su zama masu amsawa sosai kuma suna da halaye iri ɗaya na sinadarai, kamar ikonsu na samar da ions \( \text{M}^+ \) ta hanyar rasa electron ɗaya.
Amsa:
Sodium da potassium suna da electron ɗaya a cikin ƙananan harsashi na waje don haka suna da halaye iri ɗaya na sinadarai.
Tambaya ta 3: Tantance Valence Electrons
Tambaya: Nawa ne electrons na valence yake da sinadarin da ke da lambar atomic 14? Haka kuma a ƙayyade rukuni da tsawon sinadarin.
Tattaunawa:
Sinadarin da ke da lambar atomic 14 shine silicon (Si). Tsarin electrons ɗinsa shine:
\[ \text{1s}^2 2s^2 2p^6 3s^2 3p^2 \]
Elektrons na Valence sune electrons a cikin mafi kyawun harsashi, wanda a wannan yanayin harsashi ne na 3:
– 3s^2: 2 electrons
– 3p^2: 2 electrons
Adadin electrons na valence a cikin silicon shine jimlar ƙananan harsashi na 3s da 3p, wanda shine electrons 4. Saboda yana da electrons 4 a cikin mafi kyawun harsashi, Si yana cikin rukunin IVA (ko 14). Kuma saboda mafi girman Layer cike shine harsashi na uku (3), Si yana cikin lokaci na 3.
Amsa:
Silicon yana da electrons guda 4 na valen, yana cikin rukunin IVA (14) da kuma lokaci na 3.
Tambaya ta 4: Sauye-sauyen da ake samu a cikin Halayen Atom
Tambaya: Me yasa akwai yanayin raguwar radius na atomic daga hagu zuwa dama a tsawon lokaci?
Tattaunawa:
A tsawon wani lokaci, adadin atomic da adadin protons a cikin nucleus suna ƙaruwa yayin da kake motsawa daga hagu zuwa dama. Wannan yana ƙara jan hankalin Coulombic tsakanin nucleus da electrons da ke kewaye. Sakamakon haka, electrons suna ƙara jan hankali zuwa nucleus, wanda ke haifar da raguwar radius na atomic.
Bugu da ƙari, adadin harsashin electron ya kasance iri ɗaya a tsawon wani lokaci, don haka babu wani ƙarin tasirin kariya don daidaita karuwar jan hankalin nukiliya, wanda ya fi jan electrons kusa da tsakiya yadda ya kamata.
Amsa:
Radius na atom yana raguwa daga hagu zuwa dama a tsawon wani lokaci saboda ƙara yawan protons yana ƙarfafa jan hankalin nucleus akan electrons ba tare da ƙara harsashin electron don rage wannan tasirin ba.
Tambaya ta 5: Gano Abubuwan da suka danganci Halaye
Tambaya: Sinadarin iskar gas ne a zafin ɗaki, ba shi da wani tasiri kuma yana cikin rukuni na VIIIA (18). Kayyade sinadarin da lambar atom ɗinsa.
Tattaunawa:
Sinadaran iskar gas waɗanda ba sa aiki a zafin ɗaki kuma suna cikin rukuni na VIIIA (18) an haɗa su a cikin rukunin iskar gas mai daraja. Ga rukuni na VIIIA (18), ɗaya daga cikin sinadaran da aka fi sani shine neon (Ne).
Tsarin lantarki na neon shine:
\[ \text{1s}^2 2s^2 2p^6 \]
Da tsarin da ke sama, za mu iya ganin cewa dukkan ƙananan harsashin neon sun cika gaba ɗaya, wanda hakan ya sa ya zama mai ƙarfi da rashin aiki. Ne yana da lambar atomic ta 10.
Amsa:
Sinadarin shine neon (Ne) mai lambar atomic 10.
Kammalawa
Fahimtar teburin abubuwa na lokaci-lokaci yana da matuƙar muhimmanci wajen nazarin da kuma amfani da sinadarai. Kwarewar muhimman ra'ayoyi kamar tsarin lantarki, yanayin da ke cikin teburin lokaci-lokaci, da ƙungiyoyi da lokaci yana ba mu damar ƙwarewa a fannoni da yawa na sinadarai cikin inganci. Wannan labarin, tare da misalan matsalolinsa da kuma tattaunawa mai zurfi, ana sa ran zai taimaka muku wajen ƙarfafa fahimtar teburin lokaci-lokaci da aikace-aikacensa a fannin sinadarai.
