Hahnium (cim Ha) yog cov tshuaj lom neeg, atomic naj npawb 105 ntawm lub sijhawm teem sijhawm. Vim hais tias cov lus xaus hais txog cov khoom no tau nce ntau xyoo tom qab hauv Soviet Union, lwm lub npe "Dubnium" (Db) raug saws.
Vim li cas Hahnium hu ua dubnium?
Lo Lus Keeb Kwm: Dubnium yog npe rau Dubna, Russia, lub tsev ntawm Lub Tsev Haujlwm Sib Koom rau Kev Tshawb Fawb Nuclear, qhov twg lub ntsiab lus tau tshaj tawm thawj zaug. Qee tus kws tshawb fawb Asmeskas ntawm University of California, Berkeley tau sim kom tau lub ntsiab lus hu ua "hahnium" rau tus kws tshawb fawb German Otto Hahn.
H¹ yog dab tsi?
symb. tshuaj element strontium. cov tshuaj strontium.
nqe 72 yog dab tsi?
Lub caij yog tus lej 72 hauv lub sijhawm, thiab hu ua hafnium. Nws siv nws lub npe los ntawm hafnium, lub npe Latin qub rau Copenhagen uas yog lub nroog uas nws tau raug cais tawm thawj zaug hauv xyoo 1922.
Puas yog H + A hydrogen lossis hydroxide?
pH sawv cev rau qhov muaj peev xwm ntawm Hydrogen thiab yog qhov tseeb ntawm qhov ntsuas ntawm hydrogen ions (H +) hauv kev daws. Dej tawg (dissociates) rau hauv protons (H+) thiab hydroxides (OH–). Cov tshuaj tiv thaiv no thim rov qab.
