Tuum tuuma ja elektroni vahel nõrgeneb, elektroni koosneb nukleonidest: prootonitest (laeng +1) ja potentsiaalne energia kasvab) välimise kihi elektrone. neutronitest (laeng 0). Elektronpilve moodustavad Seega on reaalne orbitaalide täitumise järjekord kiiresti liikuvad elektronid (laeng -1). Pea kogu aatomi mass on koondunud aatomi tuuma. 1s2s 2 p3s3 p4 s3d 4 p5s 4d 5 p6 s 4f 5d 6 p7 s5 Elektronide olemus on dualistlik neil on nii osakese (seisumass, laeng) kui ka laine omadused (lainepikkus, Keemilise sideme üldiseloomustus sagedus). Liikuvat elektroni aatomis vaadeldakse nagu seisvat lainet kolmemõõtmelises ruumis. Mistahes keemiline side põhineb elektromagnetilisel
22 a. E x p l a i nth e ta s k . Ex p l a i nth a t th i s task w orksw i th into full use(bydrivingit slowlyfor a A p p e n d i x1 a t th e b a c ko f th e b o o k.Go throughthe setperiod) lette rsS & T w i th S s .Ssw o rk i n pai rsand do the 1"_n ;:, ex e rc i s eC.h e c kS s 'a n s w e rsth, e n hel p5s to expl ai n seeover = (tr)inspecta place;lool seeabout = (tr)dealwith; seeto t h e m e a n i n go f e a c h p h ra s e S . s shoul dmemori se seeoff = (tr)accompany a travellerto round t h e s ep h ra s e s
22 a. E x p l a i nth e ta s k . Ex p l a i nth a t th i s task w orksw i th into full use(bydrivingit slowlyfor a A p p e n d i x1 a t th e b a c ko f th e b o o k.Go throughthe setperiod) lette rsS & T w i th S s .Ssw o rk i n pai rsand do the 1"_n ;:, ex e rc i s eC.h e c kS s 'a n s w e rsth, e n hel p5s to expl ai n seeover = (tr)inspecta place;lool seeabout = (tr)dealwith; seeto t h e m e a n i n go f e a c h p h ra s e S . s shoul dmemori se seeoff = (tr)accompany a travellerto round t h e s ep h ra s e s
22 a. E x p l a i nth e ta s k . Ex p l a i nth a t th i s task w orksw i th into full use(bydrivingit slowlyfor a A p p e n d i x1 a t th e b a c ko f th e b o o k.Go throughthe setperiod) lette rsS & T w i th S s .Ssw o rk i n pai rsand do the 1"_n ;:, ex e rc i s eC.h e c kS s 'a n s w e rsth, e n hel p5s to expl ai n seeover = (tr)inspecta place;lool seeabout = (tr)dealwith; seeto t h e m e a n i n go f e a c h p h ra s e S . s shoul dmemori se seeoff = (tr)accompany a travellerto round t h e s ep h ra s e s
22 a. E x p l a i nth e ta s k . Ex p l a i nth a t th i s task w orksw i th into full use(bydrivingit slowlyfor a A p p e n d i x1 a t th e b a c ko f th e b o o k.Go throughthe setperiod) lette rsS & T w i th S s .Ssw o rk i n pai rsand do the 1"_n ;:, ex e rc i s eC.h e c kS s 'a n s w e rsth, e n hel p5s to expl ai n seeover = (tr)inspecta place;lool seeabout = (tr)dealwith; seeto t h e m e a n i n go f e a c h p h ra s e S . s shoul dmemori se seeoff = (tr)accompany a travellerto round t h e s ep h ra s e s
annaabi.ee 
