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PRAZEODIM

PRAZEODIM (Praseodymium), Rr, elementi khimiyavii guruhi III sis­temai davrii Mendeleev; raqami atomiash 59, massai atamiash 140,9077. Nig. niz Lantanoidho.

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SATHI VINTI

SATHI VINTI, sathest, ki khati £ hangomi dar girdi mehvari nojunboni OO’ bo surati kunjii …