Video: Dab tsi ntawm daim ntawv teev sijhawm yog xov tooj cua?
2024 Tus sau: Miles Stephen | [email protected]. Kawg hloov kho: 2023-12-15 23:36
Muaj ob kab hauv qab daim ntawv qhia hnub : lanthanide thiab actinide series. Lub lanthanide series tuaj yeem pom nyob rau hauv lub ntiaj teb. Tsuas yog ib qho xwb keeb hauv series yog xov tooj cua.
Ib yam li ntawd, nyob qhov twg ntawm lub rooj noj mov yog cov khoom siv hluav taws xob?
Tag nrho cov naturally tshwm sim radioactive cov ntsiab lus yog concentrated ntawm atomic tooj 84 thiab 118 ntawm lub daim ntawv qhia hnub Txawm tias Tc thiab Pm yog ib qho kev zam.
Tsis tas li ntawd, hluav taws xob ntawm lub rooj zaum yog dab tsi? Hluav taws xob yog zog. Nws tuaj yeem los ntawm cov atoms tsis ruaj khov uas dhau los ntawm cov hluav taws xob tawg, lossis nws tuaj yeem tsim los ntawm cov tshuab. Hluav taws xob taug kev los ntawm nws qhov chaw nyob rau hauv daim ntawv ntawm lub zog tsis muaj zog los yog energized hais. Hom kev ionizing hluav taws xob . Lub Sijhawm Sijhawm.
Tsis tas li ntawd, cov ntsiab lus dab tsi ntawm lub rooj sib tham yog cov xov tooj cua hauv lawv daim ntawv tshaj plaws?
Cuaj lub ntsiab 84–92 yog hu ua "naturally oc-curring" radioactive element. Lawv yog polonium, astatin, radon , francium , radium, actinium, thorium, protactinium thiab uranium.
Thaum twg lub sij hawm ntawm lub sij hawm lub sij hawm yog tag nrho ntawm ib txwm tshwm sim cov ntsiab lus radioactive?
Ntau ntau cov ntsiab lus muaj ib txwm - tshwm sim radioactive isotopes, xws li carbon-14 thiab potassium-40. Txawm li cas los xij, dhau keeb #83, bismuth, tsis muaj isotopes ruaj khov- tag nrho isotopes ntawm tag nrho ntawm cov no cov ntsiab lus yog xov tooj cua.
Pom zoo:
Dab tsi yog 7 ntawm daim ntawv teev sijhawm?
Cov ntsiab lus hydrogen, nitrogen, oxygen, fluorine, chlorine, bromine thiab iodine yeej tsis pom los ntawm lawv tus kheej. Lub xya, hydrogen, yog "oddball" ntawm lub rooj zaum, tawm ntawm nws tus kheej
Lub organelle twg ua haujlwm raws li qhov chaw xa ntawv ntawm lub xov tooj ntawm tes txheeb cov proteins thiab xa lawv mus rau lawv qhov chaw xav tau sab hauv lossis sab nraud ntawm tes?
Golgi Hais txog qhov no, dab tsi organelle yog lub luag haujlwm rau kev thauj mus los? endoplasmic reticulum (ER Qhov thib ob, cov proteins txav mus los ntawm lub cell li cas? Cov proteins txav mus los endomembrane system thiab raug xa tawm los ntawm lub ntsej muag trans ntawm Golgi apparatus nyob rau hauv thauj vesicles uas txav mus los cytoplasm thiab tom qab ntawd fuse nrog plasma membrane tso tawm protein ntau mus rau sab nraum lub cell .
Dab tsi yog 114 ntawm daim ntawv teev sijhawm?
Flerovium yog ib qho khoom siv tshuaj lom neeg muaj zog nrog lub cim Fl thiab atomic tooj 114. Nws yog ib qho hluav taws xob hluavtaws hluavtaws heev. Lub caij no muaj npe tom qab Flerov Laboratory ntawm Nuclear Reactions ntawm Lub Koom Haum Koom Tes rau Kev Tshawb Fawb Nuclear hauv Dubna, Russia, qhov twg lub caij tau pom xyoo 1998
Yuav ua li cas cov khoom siv caj ces hauv txhua lub xov tooj tshiab tsim los ntawm kev faib tawm ntawm tes sib piv nrog cov khoom siv caj ces hauv lub xov tooj qub?
Mitosis tshwm sim nyob rau hauv ob lub nuclei uas zoo tib yam rau thawj nucleus. Yog li, ob lub hlwb tshiab tsim tom qab kev faib tawm ntawm tes muaj tib yam khoom siv caj ces. Thaum lub sij hawm mitosis, chromosomes condense los ntawm chromatin. Thaum saib nrog lub microscope, chromosomes pom nyob rau hauv lub nucleus
Dab tsi yog 3 lub ntsiab lus uas ploj lawm hauv daim ntawv teev sijhawm?
Tom qab ntawd nws tau pom tias yog gallium. Gallium, germanium, thiab scandium yog tag nrho cov tsis paub nyob rau hauv 1871, tab sis Mendeleev tshuav qhov chaw rau txhua tus thiab kwv yees lawv cov atomic masses thiab lwm yam tshuaj. Tsis pub dhau 15 xyoos, cov ntsiab lus "tsis ploj" tau pom, ua raws li cov yam ntxwv tseem ceeb Mendeleev tau sau tseg