Keeb Kwm ntawm Actinides Thawj cov actinides tau pom yog Uranium los ntawm Klaproth hauv xyoo 1789 thiab Thorium los ntawm Berezelius hauv xyoo 1829, tab sis feem ntau ntawm Actinides yog cov khoom tsim los ntawm tib neeg xyoo pua 20. Actinium thiab Protactinium muaj nyob rau hauv qhov me me, raws li cov khoom lwj ntawm 253-Uranium thiab 238-Uranium.
Puas yog actinides tib neeg tsim?
Actinides yog 15 lub ntsiab lus nrog atomic tooj ntawm 89 txog 103. … Cov pawg actinides suav nrog feem ntau cov neeg tsim khoomtsuas yog qee qhov kev zam xws li uranium thiab thorium.
Puas yog actinides tsim tawm?
Cov actinides, cov ntsiab lus 90-103, ua raws li actinium ntawm lub sijhawm teem sijhawm. Lawv muaj electron configurations ntawm 5fx 6d1 7s2. Nrog rau kev zam ntawm actinium, thorium, thiab uranium, cov actinides tsis pom nyob rau hauv ib txwm muaj, thiab hloov pauv synthetically tsim los ntawm neutron bombardment lossis hauv particle accelerators.
Puas yog lanthanides neeg tsim?
Cov lanthanides yog reactive, silver-xim hlau. Cov man-made cov ntsiab lus ntawm lub rooj zaum yog cov uas tsis pom nyob rau hauv qhov xwm txheej, tab sis tau raug tsim los ntawm cov kws tshawb fawb. Cov ntsiab lus no tsis tshua muaj tsawg.
Puas muaj cov actinides nyob rau hauv cov xwm txheej?
tsib actinides tau pom nyob rau hauv qhov: thorium, protoactinium, uranium, neptunium, thiab plutonium. Uranium yog dav faib thiab tshwm sim hauv yuav luag txhua cov av. Thorium yogtam sim no nyob rau theem qis hauv pob zeb thiab av. Cov khoom me me ntawm qhov tsis muaj plutonium tseem raug txheeb xyuas hauv ib puag ncig.
