Txhua tus nqi siab tshaj ntawm e/m piv yog rau H+ ion.
Cov roj twg muaj siab tshaj e los ntawm M piv?
e / m piv yog pom nyob rau hauv rooj plaub ntawm hydrogen gas. Yog vim li cas: Hydrogen yog tib lub caij uas tsis nqa ib qho neutron. Hauv anode ray tawm nws nqa 1 tus nqi zoo thiab qhov loj kuj yog 1.
Rau hom twg hauv qab no e/m tus nqi siab tshaj?
Yog li, pawg yuav yog=. Thiab, tus nqi yuav yog. Them rau huab hwm coj piv ntawm helium yog 0. Yog li, peb tuaj yeem xaus tias hydrogen muaj qhov siab tshaj plaws rau huab hwm coj piv.
Qhov twg hauv qab no muaj qis tshaj e M piv?
Qhov kev txiav txim nce ntxiv (qis ua ntej) rau qhov txiaj ntsig ntawm e / / m (them / / mass) rau electron (e), proton (p), neutron (n), thiab alpha particle(alpha) yog.e/m rau electron yog 1/0 (raws li electron muaj negligible mass), rau proton yog 1/1, rau neutron yog 0/1, thiab alpha particle yog 2/4 los yog 1/2.
Tus piv ntawm e los ntawm M yog dab tsi?
Tus CODATA pom zoo tus nqi yog −e/me=−1.75882001076(53)×1011 C⋅ kg−1 CODATA hais txog qhov no raws li tus nqi hluav taws xob-rau-mass quotient, tab sis feem ntau tseem siv. Muaj ob txoj hauv kev los ntsuas tus nqi-rau-qhov loj ntawm ib qho hluav taws xob, sib nrug ntawm Thomson thiab Dunnington txoj kev.
