Atomic Radius sePeriodic Property yeElements
Atomu radius ndeimwe yehunhu hwezvinhu zvinogara zvichichinja-chinja patafura yeperiodic. Kunzwisisa kusiyana kweatomu radius kwakakosha pakufanotaura hunhu hwepanyama nemakemikari hwezvinhu uye maitiro azvo mumakomponi. Chinyorwa chino chichakurukura pfungwa yeatomu radius, kuti inochinja sei patafura yeperiodic, uye kuti nei shanduko idzi dzichiitika.
Kunzwisisa Atomic Radius
Radhiyasi yeatomu idaro kubva panucleus kuenda kune elektroni rekunze muatomu isina kwayakarerekera. Zvisinei, nekuti maerekitironi aripo mugore remikana isina miganhu chaiyo, kutsanangura radiyasi yeatomu nemazvo kunogona kuoma. Nzira dzakasiyana-siyana dzinoshandiswa kuyera radiyasi yeatomu:
1. Covalent Radius: Inoyerwa kubva padaro riri pakati pemaatomu maviri akabatana. Radius iyi inoshandiswa kune zvinhu zvisiri zvesimbi.
2. Ionic Radius: Inoyerwa mumakristaro eionic sehafu yedaro riri pakati pecation iri pedyo neanion nuclei.
3. Metallic Radius: Inoyerwa nekristaro yesimbi sehafu yedaro riri pakati pemaatomu eatomu esimbi ari pedyo.
4. Van der Waals radius: Inoyerwa kubva padaro riri pakati pemaatomu anobatanidza kuburikidza nemasimba asina simba evan der Waals.
Maitiro ekuchinja muAtomic Radius muPeriodic Table
Maatomu e radii anoratidza patani yekuchinja yakajairika mutafura ye periodic, zvese zviri zviviri panguva (mitsara yakatambanuka) uye mumapoka (makoramu akatwasuka).
Shanduko Munguva Yenguva
Patinofamba kubva kuruboshwe kuenda kurudyi tichiyambuka nguva iri patafura yeperiodic, atomic radii inowanzo kudzikira. Izvi zvinokonzerwa nezvinhu zvakati wandei:
1. Kuwedzera kweNuclear Charge: Huwandu hwemaprotoni ari munucleus hunowedzera sezvatinofamba muchikamu, zvichiwedzera simba renyukireya rinoshanda. Izvi zvinoswededza maerekitironi pedyo nenucleus.
2. Magoko eElectron Anogara: Kunyangwe huwandu hwemaerekitironi huchiwedzera, anozadza maorbital mugoko rimwe chete. Mhedzisiro inokwezva yekuwedzera kwesimba renyukireya yakakura kupfuura kudzoserwa pakati pemaerekitironi, saka radius yeatomu inoderera.
Muenzaniso:
– Lithium (Li): Nhamba yeAtomu 3, radius yeatomu 152 pm.
– Beryllium (Be): Nhamba yeatomu 4, radius yeatomu 112 pm.
– Boron (B): Nhamba yeatomu 5, radius yeatomu 85 pm.
Kuchinja Mumakirasi Ese
Patinenge tichidzika neboka, atomic radii inowanzowedzera. Zvinhu zvinopesvedzera izvi ndeizvi:
1. Kuwedzerwa kweElectron Shell: Chinhu chimwe nechimwe muboka repasi chine electron shell imwe chete kupfuura chinhu chiri pamusoro payo. Kuwedzerwa uku kwe shell kunowedzera daro riri pakati pe nucleus ne electron yekunze.
2. Kudzivirira: Maerekitironi ari mumagoko akadzika anoderedza kudhonzwa kwemasero kubva munucleus, kuitira kuti maerekitironi ekunze asakwezvwa nesimba sezvinoita maerekitironi ari mumagoko ari pedyo nenucleus.
Muenzaniso:
– Lithium (Li): Nhamba yeAtomu 3, radius yeatomu 152 pm.
– Sodium (Na): Nhamba yeAtomu 11, radius yeatomu 186 pm.
– Potassium (K): Nhamba yeAtomu 19, radius yeatomu 227 pm.
Sei Kuchinja Uku Kwakaitika?
Kuchinja kweatomu radius mu periodic table kunogona kutsanangurwa nepfungwa dzekutanga mu chemistry, dzakadai se effective nuclear charge, screen effect, uye kuwedzera ma electron shells.
Mutoro weCore Unoshanda
Kuchaja kwenyukireya kunoshanda ndiko kukwezva kwenucleus pamaerekitironi ekunze mushure mekutarisa mhedzisiro yekuongorora yemaerekitironi emukati. Fomura yacho ndeiyi:
\[ Z_{\text{eff}} = Z – S \]
Apo \( Z \) iri nhamba yeatomu (nhamba yemapurotoni) uye \( S \) iri nhamba yemaerekitironi ari mugoko remukati. Sezvo \( Z_{\text{eff}} \) ichiwedzera, kukwezvana kwemaerekitironi ekunze kunowedzerawo, zvichiita kuti radius yeatomu iderere.
Mhedzisiro yekudzivirira
Maerekitironi ari mugoko rakadzika anodzivirira kana kudzima kukwezva kwenucleus pamaerekitironi ekunze. Maerekitironi akawanda aripo, ndiko kukura kwekudzivirira uku, zvichiita kuti maerekitironi ekunze asungirire zvisina kurongeka uye atomu radius iwedzere.
Kuwedzera kweElectron Shell
Nguva imwe neimwe patinofamba pasi peboka riri patafura yeperiodic, goko idzva remaerekitironi rinowedzerwa. Goko idzva iri rinoisa maerekitironi ekunze kure nenucleus, zvichiwedzera atomic radius.
Mhedzisiro yeKuchinja muAtomic Radius
Kuchinja kweatomu radius kune simba guru pamakemikari uye hunhu hwezvinhu.
Simba reIonization
Simba reIonization isimba rinodiwa kubvisa elektroni kubva muatomu isina kusimba muchikamu chegasi. Kana radius yeatomu idiki, kukwezva kwenucleus kune elektroni yekunze kwakasimba, nokudaro zvichiwedzera simba reionization. Kusiyana neizvi, radius yakakura yeatomu inokonzera simba reionization rakaderera.
Kubatana kweElectron
Kubatana kwemaerekitironi (electron affinity) ndiko kuchinja kwesimba kana erekitironi yawedzerwa kuatomu isina kusimba muchikamu chegasi. Zvinhu zvine maatomu madiki (small atomic radii) zvinowanzova nekubatana kwemaerekitironi kwakawanda nekuda kwekukwezvwa kwakasimba kwenucleus kune erekitironi itsva.
Kusashanda zvakanaka kwemagetsi
Electronegativity kugona kweatomu kukwezva maerekitironi mukemikari bond. Maatomu ane radii diki uye manyukiliya makuru anoshanda anowanzova neelectronegativities yakakwira.
Zvimiro zvemuviri
Atomic radius inokanganisawo zvinhu zvakaita se density, melting point, uye boiling point. Semuenzaniso, alkali metals dzine atomic radii hombe dzinowanzova ne melting points shoma uye boiling points pane transition metals dzine atomic radii diki.
Mhedziso
Atomu radius ndeimwe yehunhu hwe periodic hunokosha pakunzwisisa maitiro ezvinhu mumakemikari akasiyana-siyana uye maitiro epanyama. Maitiro ekuchinja kweatomu radius mu periodic table anoratidza shanduko mukushanda kwe nuclear charge, mhedzisiro yekuongorora, uye kuwedzerwa kwema electron shells. Kunzwisisa atomu radius kunobvumira masayendisiti kufanotaura hunhu hwemakemikari uye hwepanyama hwezvinhu, pamwe nekuita kwavo uye maitiro avo ekuumba makemikari. Saka, kudzidza atomu radius kunopa ruzivo rwakadzama pamusoro pechimiro chakakosha uye hunhu hwezvinhu zviri muchadenga.
