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3&> EFXRGHYDXEGF

Ct ogfl ct dmijetxru et txyheih xmiri |eoo bi ~ireghed xcboi& Cfh iqif ea tgjihcu |i

dgjjyfedcxi |exm cfgxmir ~crx ga xmi yfeqirti/ |i dcf bi tyri xmi gfi xmefl xmcx bgxm

dyoxyri |eoo mcqi ef dgjjgf ef cf grhirih tutxij ga xmi ioijifx xmcx |eoo bi eftxcfxo u

ridglfepcboi bu bgxm efxiooelifx oeai agrjt et |rexxif bu @&Ijtoiu ef met bggk Xmi Ioijifxt&

Xmi ~ireghed xcboi ga xmi ioijifxt et gfi ga xmi jgtx ~g|irayo edgft ef Tdeifdi& Efhiih/

fgxmefl syexi oeki ex i}etxt ef begoglu ga ~mutedt/ gr cfu gxmir brcfdm ga tdeifdi/ agr xmcx

jcxxir& Gfi tiit ~ireghed xcboit iqiru|miri0 ef efhytxreco ocbt/ |grktmg~t/ cdchijed ocbt

cfh ga dgyrti oidxyri mcoot&

Xmi ~ireghed xcboi ga xmi dmijedco ioijifxt et c xcbyocrjixmgh ga het~ocuefl xmi

dmijedco ioijifxt & Coxmgylm ~ridyrtgrt xg xmet xcboi i}etx/ ext efqifxegf et lifircoou drihexih

xg RyttecfdmijetxHjexre Jifhioiiq ef 3=15& Jifhioiiq efxifhih xmi xcboi xg eooytxrcxi

ridyrrefl -"~ireghed"% xrifht ef xmi ~rg~irxeit ga xmi ioijifxt& Xmi ocugyx ga xmi xcboi mct

biif riaefih cfh i}xifhih gqir xeji/ ct fi| ioijifxt mcqi biif hetdgqirih/ cfh fi|

xmigrixedco jghiot mcqi biif hiqiog~ih xg i}~ocef dmijed co bimcqegr&

Xmi ~ireghed xcboi et fg| ybesyexgyt |exmef xmi cdchijed hetde~oefi ga dmijetxru/

~rgqehefl cf i}xrijiou ytiayo arcji|grk xg doctteau/ tutxijcxepi cfh dgj~cri coo xmi jcfu

heaairifx agrjt gadmijedco bimcqegr& Xmi xcboi mct cotg agyfh |ehi c~~oedcxegf ef ~mutedt/

begoglu/ iflefiirefl/ cfh efhytxru& Xmi dyrrifx txcfhcrh xcboi dgfxceft 33< ioijifxt ct ga

@cfycru 2>= -ioijifxt 3*331 cfh ioijifx 33=%&

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8/9/2019 History of Periodic Table Development

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Xmi e e o x oi icxih ia i xmihe iru a cx e

crxe oit r xmi a rjyocxe a yrrifx ycfxyjjidmcfedco xmigreitga

cxgjedtxrydxyri& Eagfigrhirt xmiioijifxt ucxgjedjctt/ cfh xmif

ogxtdirxcefgxmir rg~irxeitclceftx cxgjedjctt/ gfitiitcf

yfhyocxegfgr~ireghedexuxg xmiti~rg~irxeitctc ayfdxegfgacxgjedjctt&

Xmi aertx xgridglfe i xmitirilyocrexeit ct xmi Lirjcfdmijetx gmcff

\goalcfl iriefir mg/ ef / fgxedihcfyjbirgaxrechtgatejeocr

ioijifxt0 biriefir~rg~gtih xmi Oc|gaXrecht0

Xmijehhoiioijifx ef xmi xrechmchcxgjed|ielmx xmcx |ct xmicqircliga xmigxmir x|g

jijbirt& Xmihiftexeitgatgji xrecht agoog|ihctejeocr~cxxirf& Tggfgxmirtdeifxetxt

agyfhdmijedco riocxegftme~ti}xifhihbiugfh xrecht& Aoygrefi|ctchhih xg Do'Br'E lrgy~;

tyoayr/ g}ulif/ tioifeyjcfh xiooyreyj|irilrgy~ih efxgc acjeou; fexrglif/ ~mgt~mgryt/

crtifed/ cfxejgfu/ cfhbetjy xm|iridoctteaeihctcfgxmirlrgy~&

2& &8 gfxrebyxegf bu @gmf i|ocfht

Xmet|ct agoog|ihbu xmi Ifloetmdmijetx gmf Fi|ocfht/ |mgfgxedih

ef 9 xmcx |mif~ocdih efgrhirga efdricteflcxgjed|ielmx/ ioijifxt

gatejeocr~mutedco cfhdmijedco ~rg~irxeitridyrrihcx efxirqcotgaielmx/

|medmmi oe ifih xg xmigdxcqitgajyted/ xmgylmmetoc|gagdxcqit|ct

rehedyoihbumetdgfxij~grcreit&Mg|iqir/ |meoityddittayo agrtgji

ioijifxt/ Fi|ocfht, oc|gagdxcqit aceoih agr x|grictgft0

& Ex |ctfgx qcoeh agrioijifxt xmcx mchcxgjedjcttitmelmirxmcf Dc&

& \mif ayrxmirioijifxt|irihetdgqirih/ tydmct xmifgboilctit Mi/ Fi/ Cr%/ xmiu

dgyohfgx bicddgjjghcxih efmet xcboi&

2& &9 gfxrebyxegf bu jexre Eqcfgqetm Jifhioiiq

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Aefcoou/ ef 3=15 xmi Ryttecf dmijetxru ~rgaittgr Hjexre Eqcfgqedm

Jifhioiiq & Jifhioiiq ~ogxxih c ai| ioijifxt gyx ga txredx jctt

tisyifdi ef grhir xg jcki c bixxir jcxdm xg xmi ~rg~irxeit ga xmier

fielmbgrt ef xmi xcboi/ dgrridxih jetxckit ef xmi qcoyit ga tiqirco

cxgjed jcttit/ cfh ~rihedxih xmi i}etxifdi cfh ~rg~irxeit ga c ai|

fi| ioijifxt ef xmi ij~xu dioot ga met xcboi& Jifhioiiq |ct ocxir qefhedcxih bu xmi

hetdgqiru ga xmi ioidxrgfed txrydxyri ga xmi ioijifxt ef xmi ocxi 35xm cfh icrou 2>xm difxyru&

Icroeir cxxij~xt xg oetx xmi ioijifxt xg tmg| xmi riocxegftme~t bix|iif xmij -agr i}cj~oi

bu i|ocfht% mch ytycoou efqgoqih ~yxxefl xmij ef grhir ga cxgjed jctt& Jifhioiiq t kiu

eftelmx ef hiqetefl xmi ~ireghed xcboi |ct xg ocu gyx xmi ioijifxt xg eooytxrcxi ridyrrefl

-"~ireghed"% dmijedco ~rg~irxeit -iqif ea xmet jicfx tgji ga xmij |iri fgx ef jctt grhir%/

cfh xg oicqi lc~t agr "jettefl" ioijifxt& Jifhioi iq ytih met xcboi xg ~rihedx xmi ~rg~irxeit

ga xmiti "jettefl ioijifxt"/ cfh jcfu ga xmij |iri efhiih hetdgqirih cfh aex xmi

~rihedxegft |ioo&

exm xmi hiqiog~jifx ga xmigreit gacxgjed txrydxyri -agr eftxcfdi bu ifru Jgtioiu% ex

bidcji c~~crifx xmcx Jifhioiiq mch oetxih xmi ioijifxt ef grhir ga efdrictefl cxgjed

fyjbir-e&i& xmi fix cjgyfx ga ~gtexeqi dmcrli gf xmi cxgjed fydoiyt%& Xmet tisyifdi et

ficrou ehifxedco xg xmcx rityoxefl argj ctdifhefl cx gjed jctt& Ef grhir xg eooytxrcxi ridyrrefl

~rg~irxeit/ Jifhioiiq bilcf fi| rg|t ef met xcboi tg xmcx ioijifxt |exm tejeocr ~rg~irxeit

aioo efxg xmi tcji qirxedco dgoyjft - "lrgy~t"%&

exm xmi hiqiog~jifx ga jghirf sycfxyj jidmcfedco xmigreit gaioidxrgf dgfaelyrcxegf

|exmef cxgjt/ ex bidcji c~~crifx xmcx icdm mgrepgfxco rg| -"~iregh"% ef xmi xcboi

dgrrit~gfhih xg xmi aeooefl ga c sycfxyj tmioo ga ioidxrgft& Ef Jifhioiiq t grelefco xcboi/

icdm ~iregh |ct xmi tcji oiflxm& Jghirf xcboit mcqi ~rglritteqiou ogflir ~ireght ayrxmir

hg|f xmi xcboi/ cfh lrgy~ xmi ioijifxt efxg t*/ ~*/ h* cfh a*bogdkt xg riaoidx gyr

yfhirtxcfhefl ga xmier ioidxrgf dgfaelyrcxegf&

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2&3&1 Dgfxrebyxegfbu yoeyt gxmcr iuir

Agyr jgfxmt ocxir xmi irjcf @yoeyt gxmcr Jiuir

efhi~ifhifxou hiqiog~ih xmi aertx ~ireghed xcboi/ crrcflefl xmi

ioijifxt bu jctt&

2&3&< Dgfxrebyxegfbu Loiff X& Ticbgrl

Ef xmi 358>t oiff X& Ticbgrl ehifxeaeih xmi xrcftyrcfed

ocfxmcfehit cfh xmi cdxefehit/ |medm jcu bi ~ocdih |exmef xmi

xcboi/ gr biog|