Kev Piav Qhia Txog Cov Electrons Thiab Protons
Kev nkag siab txog cov hauv paus tseem ceeb ntawm cov khoom yog lub hauv paus ntawm kev tshawb fawb niaj hnub no. Hauv plawv ntawm kev tshawb fawb txog atomic yog cov electrons thiab protons, cov khoom uas tsim tus cwj pwm thiab cov yam ntxwv ntawm atoms. Tsab xov xwm no tshawb nrhiav txog qhov xwm txheej, cov yam ntxwv, thiab qhov tseem ceeb ntawm electrons thiab protons, qhia txog kev seev cev nyuaj uas ua si hauv lub ntiaj teb ntawm cov khoom me me.
Kev Tshawb Pom ntawm Electrons thiab Protons
Hluav taws xob
Xyoo 1897, tus kws tshawb fawb Askiv JJ Thomson tau txheeb xyuas cov electrons. Thomson cov kev sim nrog cathode rays tau qhia txog qhov muaj cov khoom me me uas muaj nqi tsis zoo. Nws qhov kev tshawb pom tau ua rau muaj kev hloov pauv hauv kev nkag siab txog cov qauv atomic, ua rau muaj kev tsim cov qauv electron uas cov electrons ncig lub nucleus, zoo li cov ntiaj chaw ncig lub hnub qub.
Cov Protons
Lub sijhawm no, Ernest Rutherford tau tshawb pom cov protons tom qab xyoo 1917 los ntawm nws txoj haujlwm ntawm cov khoom alpha. Thaum saib xyuas tus cwj pwm ntawm cov khoom no thaum lawv ntaus ib lub hom phiaj tshwj xeeb, Rutherford xaus lus tias cov atoms yuav tsum muaj lub hauv paus ntom ntom thiab muaj zog zoo. Lub nucleus no tau pom tias muaj cov protons, txhua tus nqa lub zog zoo uas sib npaug rau cov electrons lub zog tsis zoo.
Cov Khoom Tseem Ceeb ntawm Electrons
Cov electrons yog cov khoom me me uas muaj qhov hnyav li ntawm 9.109 x 10^-31 kilograms, uas yog li ntawm 1/1836 qhov hnyav ntawm proton. Lawv nqa lub zog tsis zoo ntawm 1.602 x 10^-19 coulombs. Cov electrons pom muaj nyob rau hauv thaj chaw nyob ib puag ncig lub nucleus hu ua electron clouds lossis orbitals, qhov chaw uas lawv muaj nyob rau hauv cov theem zog raws li cov ntsiab cai ntawm quantum mechanics.
Kev Teeb tsa Electron thiab Quantum Mechanics
Kev kawm txog quantum mechanics tau hloov pauv txoj kev nkag siab txog tus cwj pwm ntawm electron, qhia txog lub tswv yim ntawm qhov muaj feem yuav tshwm sim es tsis yog qhov chaw ruaj khov. Electrons nyob hauv cov theem zog lossis plhaub sib cais, uas yog K, L, M, thiab lwm yam, nrog rau kev nce deb ntawm lub nucleus. Kev npaj ntawm electrons hauv cov plhaub thiab cov plhaub me me no (s, p, d, f) txiav txim siab txog cov khoom siv tshuaj lom neeg ntawm ib lub atom.
Cov electrons muaj ob qho tib si particle thiab wave-like properties, raws li tau piav qhia los ntawm de Broglie hypothesis thiab ua pov thawj los ntawm cov xwm txheej xws li electron diffraction. Qhov xwm txheej ob yam no yog qhov tseem ceeb rau tus cwj pwm ntawm electrons hauv atoms thiab molecules, ua rau muaj kev sib txuas tshuaj, kev nqus thiab kev tso tawm ntawm lub teeb, thiab lwm yam kev sib cuam tshuam atomic-scale.
Cov Khoom Tseem Ceeb ntawm Protons
Cov protons yog cov khoom me me uas nyob hauv lub nucleus ntawm ib lub atom, nrog rau qhov hnyav li ntawm 1.673 x 10^-27 kilograms, kwv yees li 1836 npaug ntawm qhov hnyav ntawm ib lub electron. Txhua lub proton nqa ib qho nqi zoo ntawm 1.602 x 10^-19 coulombs, ua kom qhov nqi ntawm ib lub electron sib npaug zoo tab sis nrog qhov polarity sib txawv.
Tus naj npawb ntawm cov protons hauv ib lub nucleus, hu ua tus lej atomic (Z), txhais cov ntsiab lus ntawm lub ntsiab lus. Piv txwv li, hydrogen muaj ib qho proton, ua rau nws tus lej atomic yog 1, thaum carbon muaj rau protons, sib raug rau tus lej atomic ntawm 6. Tus lej atomic no qhia txog tus kheej thiab qhov chaw ntawm lub ntsiab lus ntawm lub rooj periodic.
Lub zog nuclear muaj zog
Cov protons raug khi ua ke hauv lub nucleus los ntawm lub zog nuclear muaj zog, uas yog ib qho ntawm plaub lub zog tseem ceeb hauv xwm. Txawm hais tias lawv muaj lub zog zoo, uas ua rau electrostatic repulsion ntawm lawv, lub zog nuclear muaj zog txaus los tuav cov protons ua ke nrog neutrons, tsim cov nuclei ruaj khov. Lub zog no ua haujlwm ntawm qhov luv luv heev, sib piv rau qhov loj ntawm cov nuclei atomic.
Kev sib cuam tshuam ntawm cov electrons thiab protons
Kev Ruaj Ntseg Atomic
Qhov ruaj khov ntawm ib lub atom yog qhov sib npaug zoo ntawm lub zog nyiam uas cov protons ua thiab kev sib cuam tshuam ntawm cov electrons nrog ib leeg. Lub nucleus, uas muaj cov protons (thiab feem ntau yog neutrons), nyiam cov electrons nyob ib puag ncig, tuav lawv hauv lawv lub voj voog. Qhov kev nyiam electrostatic no yog qhov tseem ceeb rau qhov ruaj khov tag nrho ntawm lub atom.
Thaum ib lub atom muaj tus lej protons thiab electrons sib npaug zos, nws yog qhov nruab nrab hluav taws xob. Txawm li cas los xij, yog tias electrons tau txais lossis ploj mus, lub atom dhau los ua ion. Cov ions uas muaj nqi zoo (cations) tsim thaum ib lub atom poob electrons, thaum cov ions uas muaj nqi tsis zoo (anions) tshwm sim thaum ib lub atom tau txais electrons. Cov ions no ua lub luag haujlwm tseem ceeb hauv cov tshuaj lom neeg thiab kev tsim cov tshuaj sib xyaw.
Chemical Bonding
Qhov kev sib cuam tshuam ntawm cov electrons thiab protons yog qhov tseem ceeb rau kev sib txuas tshuaj lom neeg. Hauv cov kev sib txuas covalent, cov atoms sib koom ua khub ntawm cov electrons kom ua tiav cov qauv electron ruaj khov, feem ntau zoo li cov pa roj zoo. Piv txwv li, hauv cov dej molecule (H2O), oxygen sib koom cov electrons nrog ob lub hydrogen atoms.
Hauv cov ionic bonds, cov atoms hloov cov electrons rau ib leeg, ua rau muaj cov ions nrog cov nqi sib txawv, uas rub ib leeg electrostatically. Ib qho piv txwv ntawm qhov no yog sodium chloride (NaCl), qhov twg sodium poob ib lub electron los ua Na + ion, thiab chlorine tau txais ib lub electron los ua Cl- ion, ua rau muaj kev tsim ntawm ib lub ionic lattice ruaj khov.
Qhov Tseem Ceeb ntawm Electrons thiab Protons
Hauv Chemistry
Cov electrons thiab protons yog qhov tseem ceeb rau cov tshuaj lom neeg thiab kev tsim cov molecules. Lawv qhia txog yuav ua li cas atoms yuav sib cuam tshuam, sib koom ua ke, thiab hloov pauv, qhia txog cov txheej txheem los ntawm cov tshuaj lom neeg yooj yim tshaj plaws mus rau cov txheej txheem biochemical nyuaj. Lub rooj teev sijhawm nws tus kheej tau teeb tsa raws li cov yam ntxwv ntawm cov khoom me me no, coj cov kws tshuaj lom neeg hauv kev kwv yees tus cwj pwm ntawm cov ntsiab lus.
Hauv Kev Siv Tshuab thiab Tshuaj
Kev nkag siab txog cov electrons thiab protons tau ua rau muaj kev nce qib tseem ceeb ntawm thev naus laus zis. Cov khoom siv hluav taws xob vam khom kev tswj hwm electron flow, ua rau muaj kev tsim cov khoos phis tawj, smartphones, thiab ntau yam khoom siv hluav taws xob. Hauv kev kho mob, cov txheej txheem xws li MRI vam khom tus cwj pwm ntawm cov protons hauv lub cev los tsim cov duab sab hauv kom ntxaws, hloov pauv lub peev xwm kuaj mob.
xaus
Cov electrons thiab protons yog lub hauv paus ntawm cov qauv atomic thiab tus cwj pwm. Lawv qhov kev tshawb pom thiab kev nkag siab tom qab ntawd ntawm lawv cov khoom tau ua rau muaj kev nce qib hauv chemistry, physics, thiab ntau lwm yam kev tshawb fawb. Los ntawm kev tshawb nrhiav cov kev sib cuam tshuam thiab cov yam ntxwv ntawm cov khoom me me no, cov kws tshawb fawb txuas ntxiv qhib cov lus zais ntawm lub ntiaj teb, siv lawv cov kev paub los tsav kev nce qib hauv kev siv tshuab thiab ua kom peb nkag siab tob txog lub ntiaj teb ntuj.
